What is immutable object in asp.net

A type whose instance data, fields and properties, does not change after the instance is created. 


:

class Rectangle {     private readonly long _length, _width;       public Rectangle( long length, long width) {         _length = length;         _width = width;     }     public virtual long Length {         get {             return _length;         }     }     public virtual long Width {         get {             return _width;         }     } }   class Square : Rectangle {     public Square( long width) : base( width, width) {       } }

The example class is immutable because the Length and Width properties of Rectangle do not use the set keyword.


You can follow below link for more information:

http://weblogs.asp.net/adilakhter/archive/2008/04/16/designing-efficient-immutable-net2-0-objects.aspx


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