public System.Version()

Constructs and initializes a new instance of the System.Version class.

System.Version.Major and System.Version.Minor are set to zero. System.Version.Build and System.Version.Revision are unspecified.

public System.Version(System.Int32 major, System.Int32 minor, System.Int32 build, System.Int32 revision)

Constructs and initializes a new instance of the System.Version class with the specified major, minor, build, and revision numbers.

Parameter major: A System.Int32 specifying the major component.

Parameter minor: A System.Int32 specifying the minor component.

Parameter build: A System.Int32 specifying the build component.

Parameter revision: A System.Int32 specifying the revision component.

Throws: : major, minor, build, or revision is less than zero.

using System;

public class Vers {
  public static void Main() {

    Version vers = new Version( 6, 1, 2, 4 );
    Console.WriteLine( "Version is {0}", vers.ToString() );
  }
}
   

public System.Version(System.Int32 major, System.Int32 minor, System.Int32 build)

Constructs and initializes a new instance of the System.Version class using the specified major, minor, and build values.

Parameter major: A System.Int32 specifying the major component.

Parameter minor: A System.Int32 specifying the minor component.

Parameter build: A System.Int32 specifying the build component.

Throws: : major, minor, or build is less than zero.

using System;

public class Vers {
  public static void Main() {

    Version vers = new Version( 6, 1, 2 );
    Console.WriteLine( "Version is {0}", vers.ToString() );
  }
}
   

public System.Version(System.Int32 major, System.Int32 minor)

Constructs and initializes a new instance of the System.Version class using the specified major and minor values.

Parameter major: A System.Int32 specifying the major component.

Parameter minor: A System.Int32 specifying the minor component.

Throws: : major or minor is less than zero.

using System;

public class Vers {
  public static void Main() {

    Version vers = new Version( 6, 1 );
    Console.WriteLine( "Version is {0}", vers.ToString() );
  }
}
   

public System.Version(System.String version)

Constructs and initializes a new instance of the System.Version class using the values represented by the specified System.String.

Parameter version: A System.String that represents 2 to 4 System.Int32 integers separated by period characters ('.'). Each component delineated by a period character will be parsed to a System.Int32 with System.Int32.Parse(System.String)(System.String). The numbers will be processed in the following order: major, minor, build, revision. If the revision or the revision and the build components are not represented by version, their values will be undefined. The formatting of version must be as follows, with optional components shown in square brackets ('[' and']'): major.minor[.build[.revision]], where each component returns a System.Int32 with System.Int32.Parse(System.String) (System.String).

Throws: : version has fewer than 2 components or more than 4 components (i.e. fewer than 1 or more than 3 period characters).

Throws: : version is a null reference.

Throws: : major, minor, build, or revision is less than zero.

Throws: : At least one component of version does not parse to a System.Int32 with System.Int32.Parse(System.String) (System.String).

using System;

public class Vers {
  public static void Main() {

    Version vers = new Version( "6.1.2.4" );
    Console.WriteLine( "Version is {0}", vers.ToString() );
  }
}
   

public System.Object Clone()

Returns a new System.Object with values equal to the property values of the current instance.

Returns: A new System.Object whose values are equal to the property values of the current instance.

The System.Object returned by this method must be explicitly cast to a System.Version before it may be used as one. This method is implemented to support the System.ICloneable interface.

using System;
class VersionCloneExample {
  public static void Main() {
    Version vers = new Version("6.1.2.4");
    Console.WriteLine("The string representation of the" +
                      " version is {0}.",
                      vers.ToString());
    Version clone = (Version) vers.Clone();
    Console.WriteLine("The original version was" +
                      " successfully cloned.");
    Console.Write("The string representation of the" +
                  " cloned version is {0}.",
                  clone.ToString());
  }
}
   

public System.Int32 CompareTo(System.Object version)

Returns the sort order of the current instance compared to the specified System.Object.

Parameter version: The System.Object to compare to the current instance.

Returns: A System.Int32 containing a value that reflects the sort order of the current instance as compared to version. The following table defines the conditions under which the returned value is a negative number, zero, or a positive number.

Throws: : version is not a System.Version and is not a null reference

The components of System.Version in decreasing order of importance are: major, minor, build, and revision. An undefined component is assumed to be older than any defined component. This method is implemented to support the System.IComparable interface.

using System;
class VersionTest {
   static string Test ( Version v1, Version v2 ) {
      int i = v1.CompareTo(v2);
      if ( i < 0 )
         return "older than";
      else if ( i == 0 )
         return "the same as";
      else
         return "newer than";
   }
   public static void Main() {
      Version vers1 = new Version( "6.1.2.4" );
      Version vers2 = new Version( 6, 1 );
      Version vers3 = new Version( 6, 1, 3 );
      Console.Write("Version {0} is {1} ",
                    vers1, Test(vers1, vers2));
      Console.WriteLine("version {0}", vers2); 
      Console.Write("Version {0} is {1} ",
                    vers1, Test(vers1, vers3));
      Console.WriteLine("version {0}", vers3); 
      Console.Write("Version {0} is {1} ",
                    vers3, Test(vers3, vers3));
      Console.WriteLine("version {0}", vers3); 
      Console.Write("Version {0} is {1} ",
                    vers2, Test(vers2, vers1));
      Console.WriteLine("version {0}", vers1);
   }
}
   

public System.Boolean Equals(System.Object obj)

Determines whether the current instance and the specified System.Object represent the same type and value.

Parameter obj: The System.Object to compare to the current instance.

Returns: A System.Boolean where true indicates obj is the same type as the current instance and has equal System.Version.Major, System.Version.Minor, System.Version.Build, and System.Version.Revision properties as the current instance. If obj is a null reference or is not an instance of System.Version, returns false.

This method overrides System.Object.Equals(System.Object).

using System;
class VersionEqualsExample {
   static void testEquals(Version v1, Version v2) {
      Console.Write("It is {0} that version ",
                    v1.Equals(v2));
      Console.WriteLine("{0} is equal to {1}.",
                    v1, v2);
   }
   public static void Main() {
      Version vers1 = new Version( "6.1.2.4" );
      Version vers2 = new Version( 6, 1 );
      testEquals( vers1, vers1 );
      testEquals( vers1, vers2 );
   }
}
   

public System.Int32 GetHashCode()

Generates a hash code for the current instance.

Returns: A System.Int32 containing the hash code for the current instance.

The algorithm used to generate the hash code is unspecified. This method overrides System.Object.GetHashCode.

public static System.Boolean op_Equality(System.Version v1, System.Version v2)

Determines whether two instances of System.Version are equal.

Parameter v1: An instance of the System.Version class.

Parameter v2: An instance of the System.Version class.

Returns: A System.Boolean where true indicates v1 and v2 have equal System.Version.Major, System.Version.Minor, System.Version.Build, and System.Version.Revision properties, or both v1 and v2 are null; otherwise false.

The parts of the version number are compared independently starting with the System.Version.Major property and then the System.Version.Minor, System.Version.Build, and System.Version.Revision properties, in order. This method returns as soon as one of the properties is determined not to be equal.

public static System.Boolean op_GreaterThan(System.Version v1, System.Version v2)

Determines whether the first instance of System.Version is greater than the second instance of System.Version.

Parameter v1: An instance of the System.Version class.

Parameter v2: An instance of the System.Version class.

Returns: A System.Boolean where true indicates v1 is greater than v2; otherwise false. If v1 is null, false is returned.

Throws: : v2 is a null reference.

The parts of the version number are compared independently starting with the System.Version.Major property and then the System.Version.Minor, System.Version.Build, and System.Version.Revision properties, in order. This method returns as soon as one of the properties is determined not to be equal.

public static System.Boolean op_GreaterThanOrEqual(System.Version v1, System.Version v2)

Determines whether the first instance of System.Version is greater than or equal to the second instance of System.Version.

Parameter v1: An instance of the System.Version class.

Parameter v2: An instance of the System.Version class.

Returns: A System.Boolean where true indicates v1 is greater than or equal to v2; otherwise false. If v1 is null, false is returned.

Throws: : v2 is a null reference.

The parts of the version number are compared independently starting with the System.Version.Major property and then the System.Version.Minor, System.Version.Build, and System.Version.Revision properties, in order. This method returns as soon as one of the properties is determined not to be equal.

public static System.Boolean op_Inequality(System.Version v1, System.Version v2)

Determines whether two instances of System.Version are not equal.

Parameter v1: An instance of the System.Version class.

Parameter v2: An instance of the System.Version class.

Returns: A System.Boolean where true indicates v1 and v2 have at least one unequal property; otherwise false. If v1 and v2 are both null, returns false; if one is null but not the other, returns true.

The parts of the version number are compared independently starting with the System.Version.Major property and then the System.Version.Minor, System.Version.Build, and System.Version.Revision properties, in order. This method returns as soon as one of the properties is determined not to be equal.

public static System.Boolean op_LessThan(System.Version v1, System.Version v2)

Determines whether the first instance of System.Version is less than the second instance of System.Version.

Parameter v1: An instance of the System.Version class.

Parameter v2: An instance of the System.Version class.

Returns: A System.Boolean where true indicates v1 is less than v2; otherwise false. If v2 is null, false is returned.

Throws: : v1 is a null reference.

The parts of the version number are compared independently starting with the System.Version.Major property and then the System.Version.Minor, System.Version.Build, and System.Version.Revision properties, in order. This method returns as soon as one of the properties is determined not to be equal.

public static System.Boolean op_LessThanOrEqual(System.Version v1, System.Version v2)

Determines whether the first instance of System.Version is less than or equal to the second instance of System.Version.

Parameter v1: An instance of the System.Version class.

Parameter v2: An instance of the System.Version class.

Returns: A System.Boolean where true indicates v1 is less than or equal to v2; otherwise false. If v2 is null, false is returned.

Throws: : v1 is a null reference.

The parts of the version number are compared independently starting with the System.Version.Major property and then the System.Version.Minor, System.Version.Build, and System.Version.Revision properties, in order. This method returns as soon as one of the properties is determined not to be equal.

public virtual System.Boolean Equals(System.Object obj)

Determines whether the specified System.Object is equal to the current instance.

Parameter obj: The System.Object to compare with the current instance.

Returns: true if obj is equal to the current instance; otherwise, false.

The statements listed below are required to be true for all implementations of the System.Object.Equals(System.Object) method. In the list, x, y, and z represent non-null object references. See System.Object.GetHashCode for additional required behaviors pertaining to the System.Object.Equals(System.Object) method. Implementations of System.Object.Equals(System.Object) should not throw exceptions. The System.Object.Equals(System.Object) method tests for referential equality , which means that System.Object.Equals(System.Object) returns true if the specified instance of Object and the current instance are the same instance; otherwise, it returns false . An implementation of the System.Object.Equals(System.Object) method is shown in the following C# code: public virtual bool Equals(Object obj) { return this == obj; } For some kinds of objects, it is desirable to have System.Object.Equals(System.Object) test for value equality instead of referential equality. Such implementations of Equals return true if the two objects have the same "value", even if they are not the same instance. The definition of what constitutes an object's "value" is up to the implementer of the type, but it is typically some or all of the data stored in the instance variables of the object. For example, the value of a System.String is based on the characters of the string; the Equals method of the System.String class returns true for any two string instances that contain exactly the same characters in the same order. When the Equals method of a base class provides value equality, an override of Equals in a class derived from that base class should invoke the inherited implementation of Equals . It is recommended (but not required) that types overriding System.Object.Equals(System.Object) also override System.Object.GetHashCode. Hashtables cannot be relied on to work correctly if this recommendation is not followed. If your programming language supports operator overloading, and if you choose to overload the equality operator for a given type, that type should override the Equals method. Such implementations of the Equals method should return the same results as the equality operator. Following this guideline will help ensure that class library code using Equals (such as System.Collections.ArrayList and System.Collections.Hashtable ) behaves in a manner that is consistent with the way the equality operator is used by application code. If you are implementing a value type, you should follow these guidelines: For reference types, the guidelines are as follows: If you implement System.IComparable on a given type, you should override Equals on that type. The System.Object.Equals(System.Object) method is called by methods in collections classes that perform search operations, including the System.Array.IndexOf(System.Array,System.Object) method and the System.Collections.ArrayList.Contains(System.Object) method.

using System;
class MyClass {
   static void Main() {
      Object obj1 = new Object();
      Object obj2 = new Object();
      Console.WriteLine(obj1.Equals(obj2));
      obj1 = obj2; 
      Console.WriteLine(obj1.Equals(obj2)); 
   }
}

using System;
public class Point: object {
 int x, y;
 public override bool Equals(Object obj) {
 //Check for null and compare run-time types.
 if (obj == null || GetType() != obj.GetType()) return false;
 Point p = (Point)obj;
 return (x == p.x) && (y == p.y);
 }
 public override int GetHashCode() {
 return x ^ y;
 }
}

class Point3D: Point {
 int z;
 public override bool Equals(Object obj) {
 return base.Equals(obj) && z == ((Point3D)obj).z;
 }
 public override int GetHashCode() {
 return base.GetHashCode() ^ z;
 }
}

using System;
class Rectangle {
 Point a, b;
 public override bool Equals(Object obj) {
 if (obj == null || GetType() != obj.GetType()) return false;
 Rectangle r = (Rectangle)obj;
 //Use Equals to compare instance variables
 return a.Equals(r.a) && b.Equals(r.b);
 }
 public override int GetHashCode() {
 return a.GetHashCode() ^ b.GetHashCode();
 }
}

using System;
public struct Complex {
 double re, im;
 public override bool Equals(Object obj) {
 return obj is Complex && this == (Complex)obj;
 }
 public override int GetHashCode() {
 return re.GetHashCode() ^ im.GetHashCode();
 }
 public static bool operator ==(Complex x, Complex y) {
 return x.re == y.re && x.im == y.im;
 }
 public static bool operator !=(Complex x, Complex y) {
 return !(x == y);
 }
}

public static System.Boolean Equals(System.Object objA, System.Object objB)

Determines whether two object references are equal.

Parameter objA: First object to compare.

Parameter objB: Second object to compare.

Returns: true if one or more of the following statements is true: otherwise returns false.

This static method checks for null references before it calls objA.Equals(objB ) and returns false if either objA or objB is null. If the Equals(object obj) implementation throws an exception, this method throws an exception.

using System;

public class MyClass {
   public static void Main() {
   string s1 = "Tom";
   string s2 = "Carol";
   Console.WriteLine("Object.Equals(\"{0}\", \"{1}\") => {2}", 
      s1, s2, Object.Equals(s1, s2));

   s1 = "Tom";
   s2 = "Tom";
   Console.WriteLine("Object.Equals(\"{0}\", \"{1}\") => {2}", 
      s1, s2, Object.Equals(s1, s2));

   s1 = null;
   s2 = "Tom";
   Console.WriteLine("Object.Equals(null, \"{1}\") => {2}",
       s1, s2, Object.Equals(s1, s2));

   s1 = "Carol";
   s2 = null;
   Console.WriteLine("Object.Equals(\"{0}\", null) => {2}", 
       s1, s2, Object.Equals(s1, s2));

   s1 = null;
   s2 = null;
   Console.WriteLine("Object.Equals(null, null) => {2}", 
       s1, s2, Object.Equals(s1, s2));
   }
}
   

public System.Void Finalize()

Allows a System.Object to perform cleanup operations before the memory allocated for the System.Object is automatically reclaimed.

During execution, System.Object.Finalize is automatically called after an object becomes inaccessible, unless the object has been exempted from finalization by a call to System.GC.SuppressFinalize(System.Object). During shutdown of an application domain, System.Object.Finalize is automatically called on objects that are not exempt from finalization, even those that are still accessible. System.Object.Finalize is automatically called only once on a given instance, unless the object is re-registered using a mechanism such as System.GC.ReRegisterForFinalize(System.Object) and System.GC.SuppressFinalize(System.Object) has not been subsequently called. Conforming implementations of the CLI are required to make every effort to ensure that for every object that has not been exempted from finalization, the System.Object.Finalize method is called after the object becomes inaccessible. However, there may be some circumstances under which Finalize is not called. Conforming CLI implementations are required to explicitly specify the conditions under which Finalize is not guaranteed to be called. For example, Finalize might not be guaranteed to be called in the event of equipment failure, power failure, or other catastrophic system failures. In addition to System.GC.ReRegisterForFinalize(System.Object) and System.GC.SuppressFinalize(System.Object), conforming implementations of the CLI are allowed to provide other mechanisms that affect the behavior of System.Object.Finalize . Any mechanisms provided are required to be specified by the CLI implementation. The order in which the Finalize methods of two objects are run is unspecified, even if one object refers to the other. The thread on which Finalize is run is unspecified. Every implementation of System.Object.Finalize in a derived type is required to call its base type's implementation of Finalize . This is the only case in which application code calls System.Object.Finalize . The System.Object.Finalize implementation does nothing. A type should implement Finalize when it uses unmanaged resources such as file handles or database connections that must be released when the managed object that uses them is reclaimed. Because Finalize methods may be invoked in any order (including from multiple threads), synchronization may be necessary if the Finalize method may interact with other objects, whether accessible or not. Furthermore, since the order in which Finalize is called is unspecified, implementers of Finalize (or of destructors implemented through overriding Finalize) must take care to correctly handle references to other objects, as their Finalize method may already have been invoked. In general, referenced objects should not be considered valid during finalization. See the System.IDisposable interface for an alternate means of disposing of resources. For C# developers: Destructors are the C# mechanism for performing cleanup operations. Destructors provide appropriate safeguards, such as automatically calling the base type's destructor. In C# code, System.Object.Finalize cannot be called or overridden.

public virtual System.Int32 GetHashCode()

Generates a hash code for the current instance.

Returns: A System.Int32 containing the hash code for the current instance.

System.Object.GetHashCode serves as a hash function for a specific type. A hash function is used to quickly generate a number (a hash code) corresponding to the value of an object. Hash functions are used with hashtables. A good hash function algorithm rarely generates hash codes that collide. For more information about hash functions, see The Art of Computer Programming , Vol. 3, by Donald E. Knuth. All implementations of System.Object.GetHashCode are required to ensure that for any two object references x and y, if x.Equals(y) == true, then x.GetHashCode() == y.GetHashCode(). Hash codes generated by System.Object.GetHashCode need not be unique. Implementations of System.Object.GetHashCode are not permitted to throw exceptions. The System.Object.GetHashCode implementation attempts to produce a unique hash code for every object, but the hash codes generated by this method are not guaranteed to be unique. Therefore, System.Object.GetHashCode may generate the same hash code for two different instances. It is recommended (but not required) that types overriding System.Object.GetHashCode also override System.Object.Equals(System.Object) . Hashtables cannot be relied on to work correctly if this recommendation is not followed. Use this method to obtain the hash code of an object. Hash codes should not be persisted (i.e. in a database or file) as they are allowed to change from run to run.

using System;
public struct Int32 {
 int value;
 //other methods...

 public override int GetHashCode() {
 return value;
 }
}

using System;
public struct Point {
 int x;
 int y; 
 //other methods
 
 public override int GetHashCode() {
 return x ^ y;
 }
}

using System;
public class SomeType {
 public override int GetHashCode() {
 return 0;
 }
}

public class AnotherType {
 public override int GetHashCode() {
 return 1;
 }
}

public class LastType {
 public override int GetHashCode() {
 return 2;
 }
}
public class MyClass {
 SomeType a = new SomeType();
 AnotherType b = new AnotherType();
 LastType c = new LastType();

 public override int GetHashCode () {
 return a.GetHashCode() ^ b.GetHashCode() ^ c.GetHashCode();
 }
}

using System;
public struct Int64 {
 long value;
 //other methods...

 public override int GetHashCode() {
 return ((int)value ^ (int)(value >> 32));
 }
}

public System.Type GetType()

Gets the type of the current instance.

Returns: The instance of System.Type that represents the run-time type (the exact type) of the current instance.

For two objects x and y that have identical run-time types, System.Object.ReferenceEquals(System.Object,System.Object)(x.GetType(),y.GetType()) returns true .

using System;
public class MyBaseClass: Object {
}
public class MyDerivedClass: MyBaseClass {
}
public class Test {
   public static void Main() {
   MyBaseClass myBase = new MyBaseClass();
   MyDerivedClass myDerived = new MyDerivedClass();

   object o = myDerived;
   MyBaseClass b = myDerived;

   Console.WriteLine("mybase: Type is {0}", myBase.GetType());
   Console.WriteLine("myDerived: Type is {0}", myDerived.GetType());
   Console.WriteLine("object o = myDerived: Type is {0}", o.GetType());
   Console.WriteLine("MyBaseClass b = myDerived: Type is {0}", b.GetType());
   }
}

protected System.Object MemberwiseClone()

Creates a shallow copy of the current instance.

Returns: A shallow copy of the current instance. The run-time type (the exact type) of the returned object is the same as the run-time type of the object that was copied.

System.Object.MemberwiseClone creates a new instance of the same type as the current instance and then copies each of the object's non-static fields in a manner that depends on whether the field is a value type or a reference type. If the field is a value type, a bit-by-bit copy of all the field's bits is performed. If the field is a reference type, only the reference is copied. The algorithm for performing a shallow copy is as follows (in pseudo-code): for each instance field f in this instance if (f is a value type) bitwise copy the field if (f is a reference type) copy the reference end for loop This mechanism is referred to as a shallow copy because it copies rather than clones the non-static fields. Because System.Object.MemberwiseClone implements the above algorithm, for any object, a, the following statements are required to be true: System.Object.MemberwiseClone does not call any of the type's constructors. If System.Object.Equals(System.Object) has been overridden, a.MemberwiseClone().Equals(a) might return false . For an alternate copying mechanism, see System.ICloneable . System.Object.MemberwiseClone is protected (rather than public) to ensure that from verifiable code it is only possible to clone objects of the same class as the one performing the operation (or one of its subclasses). Although cloning an object does not directly open security holes, it does allow an object to be created without running any of its constructors. Since these constructors may establish important invariants, objects created by cloning may not have these invariants established, and this may lead to incorrect program behavior. For example, a constructor might add the new object to a linked list of all objects of this class, and cloning the object would not add the new object to that list -- thus operations that relied on the list to locate all instances would fail to notice the cloned object. By making the method protected, only objects of the same class (or a subclass) can produce a clone and implementers of those classes are (presumably) aware of the appropriate invariants and can arrange for them to be true without necessarily calling a constructor.

using System;
class MyBaseClass {
   public static string CompanyName = "My Company";
   public int age;
   public string name;
}

class MyDerivedClass: MyBaseClass {

   static void Main() {
   
   //Create an instance of MyDerivedClass
   //and assign values to its fields.
   MyDerivedClass m1 = new MyDerivedClass();
   m1.age = 42;
   m1.name = "Sam";

   //Do a shallow copy of m1
   //and assign it to m2.
   MyDerivedClass m2 = (MyDerivedClass) m1.MemberwiseClone();
   }
}

+---------------+

|     42        |                           m1 

+---------------+

|     +---------|-----------------> "Sam" 

+---------------+                    /|\ 

                                      | 

+---------------+                     | 

|     42        |                     |      m2 

+---------------+                     | 

|      +--------|---------------------| 

+---------------+

public static System.Boolean ReferenceEquals(System.Object objA, System.Object objB)

Determines whether two object references are identical.

Parameter objA: First object to compare.

Parameter objB: Second object to compare.

Returns: True if a and b refer to the same object or are both null references; otherwise, false.

This static method provides a way to compare two objects for reference equality. It does not call any user-defined code, including overrides of System.Object.Equals(System.Object) .

using System;
class MyClass {
   static void Main() {
   object o = null;
   object p = null;
   object q = new Object();
   Console.WriteLine(Object.ReferenceEquals(o, p));
   p = q;
   Console.WriteLine(Object.ReferenceEquals(p, q));
   Console.WriteLine(Object.ReferenceEquals(o, p));
   }
}
   

public virtual System.String ToString()

Creates and returns a System.String representation of the current instance.

Returns: A System.String representation of the current instance.

System.Object.ToString returns a string whose content is intended to be understood by humans. Where the object contains culture-sensitive data, the string representation returned by System.Object.ToString takes into account the current system culture. For example, for an instance of the System.Double class whose value is zero, the implementation of System.Double.ToString might return "0.00" or "0,00" depending on the current UI culture. Although there are no exact requirements for the format of the returned string, it should as much as possible reflect the value of the object as perceived by the user. System.Object.ToString is equivalent to calling System.Object.GetType to obtain the System.Type object for the current instance and then returning the result of calling the System.Object.ToString implementation for that type. The value returned includes the full name of the type. It is recommended, but not required, that System.Object.ToString be overridden in a derived class to return values that are meaningful for that type. For example, the base data types, such as System.Int32, implement System.Object.ToString so that it returns the string form of the value the object represents. Subclasses that require more control over the formatting of strings than System.Object.ToString provides should implement System.IFormattable, whose System.Object.ToString method uses the culture of the current thread.

using System;

class MyClass {
   static void Main() {
      object o = new object();
      Console.WriteLine (o.ToString());
   }
}
      

public System.Object Clone()

Creates a copy of the current instance.

Returns: A System.Object of the same type as the current instance, containing copies of the non-static members of the current instance.

The exact behavior of this method is unspecified. The intent of the method is to provide a mechanism that constructs instances that are copies of the current instance, without regard for class-specific definitions of the term "copy". Use the System.Object.MemberwiseClone method to create a shallow copy of an object. For more information, see System.Object.MemberwiseClone . This method is required to return an instance of the same type as the current instance. Implement this method to provide class-specific copying behavior. Use the System.ICloneable.Clone method to obtain a copy of the current instance.

using System;
class MyClass :ICloneable {
    public int myField;
    public MyClass() {
        myField = 0;
    }
    public MyClass(int value) {
        myField = value;
    }
    public object Clone() {
        return this.MemberwiseClone();
    }
}
public class TestMyClass {
    public static void Main() {
        MyClass my1 = new MyClass(44);
        MyClass my2 = (MyClass) my1.Clone();
        Console.WriteLine("my1 {0} my2 {1}",my1.myField, my2.myField);
        my2.myField = 22;
        Console.WriteLine("my1 {0} my2 {1}",my1.myField, my2.myField);
    }
}

public System.Int32 CompareTo(System.Object obj)

Returns the sort order of the current instance compared to the specified object.

Parameter obj: The System.Object to compare to the current instance.

Returns: A System.Int32 containing a value that reflects the sort order of the current instance as compared to object. The following table defines the conditions under which the returned value is a negative number, zero, or a positive number.

For any objects A, B and C, the following are required to be true: A.CompareTo(A) is required to return zero. If A.CompareTo(B) returns zero then B.CompareTo(A) is required to return zero. If A.CompareTo(B) returns zero and B.CompareTo(C) returns zero then A.CompareTo(C) is required to return zero. If A.CompareTo(B) returns a value other than zero then B.CompareTo(A) is required to return a value of the opposite sign. If A.CompareTo(B) returns a value x not equal to zero, and B.CompareTo(C) returns a value y of the same sign as x, then A.CompareTo(C) is required to a value of the same sign as x and y . The exact behavior of this method is unspecified. The intent of this method is to provide a mechanism that orders instances of a class in a manner that is consistent with the mathematical definitions of the relational operators (<, >, and ==), without regard for class-specific definitions of the operators. Use the System.IComparable.CompareTo(System.Object) method to determine the ordering of instances of a class.