As .Net Framework is language independent and support over 20 different programming languages, many programmers will write data types in their own programming language. For example, an integer variable in C# is written as int, whereas in Visual Basic it is written as integer. Therefore in .Net Framework you have single class called System.Int32 to interpret these variables. Similarly, for the ArrayList data type .Net Framework has a common type called System.Collections.ArrayList. In .Net Framework, System.Object is the common base type from where all the other types are derived.       This system is called Common Type System. The types in...