The |BLBS^ |String Class|BLBE^ | represents character strings. The following sections describes , how to work with |HREF^VB.NET| String class . The String data type comes from the System.String class . The String type represents a string of |BLBS^ |Unicode Characters|BLBE^ | . The String class is a sealed class , so you cannot inherit another class from the String class. The String object is |BLBS^ |Immutable|BLBE^ |, 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 . So if you are in a situation in continuous operation with String Object it is recommended to use System.Text.StringBuilder . System.Text.StringBuilder class to modify a string without creating a new object. In the following sections you can see the important methods in details with descriptions .