The .NET Framework fully supports classes, inheritance, methods, properties, events, polymorphism, constructors, and other Object Oriented features. In a programming language, an Object is defined as an instance of a Class.
The String object is Immutable , it cannot be modified once it created, that means every time you use any operation in the String object , you create a new String Object . The String class is a sealed class , so you cannot inherit another class from the String class. The following VB.NET programs will teach you more about String Operations.