What is Common Type System (CTS)?
CTS is the component of CLR by which .NET Framework provides support for multiple languages because it have a type system that is common across all the languages. Two CTS-compliant languages do not require type conversion when calling the code written in one language from within the code written in another language. CTS give a base set of data types for all the languages supported by.NET Framework. This means that the size of integer and long variables is same across all .NET-compliant programming languages. However, each language uses aliases for the base data types provided by CTS. For example, CTS uses the data type system. int32 to show a 4 byte integer value; however, Visual Basic uses the alias integer for the similar; while, C# uses the alias int. This is done for the sake of clarity and simplicity.