class MyClass	//No error( No matter whether the Field ' MyClass.myString ' is 

initialized or not ). 
{
   int myInt;
   string myString;

   public MyClass( int aInt )  
    {
	myInt = aInt;
    }
}

struct MyStruct	// Error ( Field ' MyStruct.myString ' must be fully assigned 

before it leaves the constructor ).
{
   int myInt;
   string myString;

   public MyStruct( int aInt )
    {
	myInt = aInt;
    }
}

struct MyStruct
{
    int myInt;
    public MyStruct( )
    {
    }
    ~MyStruct( )   //Error.
     {
         Console.WriteLine("Destructor of MyStruct object");
     }
}

class MyClass
{
    int myInt;
    public MyClass( )
    {
    }
    ~MyClass( ) // No Error.
     {
         Console.WriteLine("Destructor of MyClass object");
     }
}

using System;	
class MainClass
{
		
  static void Main( )
    {
	Console.WriteLine( "Struct \n" );
	MyStruct var1=new MyStruct( );
			
	var1.Member="Initialized";

	// value of var1 is assigned to var2
	MyStruct var2=var1;//   stmt --> [A]
			
	//var1.str & var2.str are different memory locations in the stack.
	Console.WriteLine(var1.Member+"\n"+var2.Member);
	Console.WriteLine( "---------------" );
			
	var1.Member="Assigned";			
	Console.WriteLine( var1.Member+"\n"+var2.Member );
			
	Console.WriteLine( "\nClass\n" );
	MyClass obj1=new MyClass( );

	obj1.Member="Initialized";
			
	// reference(or simply address)of an object stored in obj1 is assigned to 

obj2.
	MyClass obj2=obj1;//   stmt --> [B]
		
	//obj1 & obj2 are 2 reference variables in the stack.They points to a 

single object 
	//in the heap.So obj1.str & obj2.str represent same memory location in the heap. 
	Console.WriteLine( obj1.Member+"\n"+obj2.Member );
	Console.WriteLine( "---------------" );

	obj1.Member="Assigned";			
	Console.WriteLine( obj1.Member+"\n"+obj2.Member );	
    }
}

public struct MyStruct
{	
    string str;
    public string Member
    {
	get
	{
	    return str;
	}
	set
	{
	    str=value;
	}
    }        
}

public class MyClass
{	
    string str;
    public string Member
    {
	get
	{
	    return str;
	}
	set
	{
	    str=value;
	}
     } 
}

Struct

Initialized
Initailized
---------------
Assigned
Initailized

Class

Initialized
Initailized
---------------
Assigned
Assigned