Built-in Types Table

The following table shows the keywords for built-in C# types, which are aliases of predefined types in the System namespace.

Remarks

All of the types in the table, except object and string, are referred to as simple types.

The C# type keywords and their aliases are interchangeable. For example, you can declare an integer variable by using either of the following declarations:

int x = 123;
System.Int32 x = 123;

To display the actual type for any C# type use the system method GetType(). For example, the following statement displays the system alias that represents the type of myVariable:

Console.WriteLine(myVariable.GetType());

You can also use the typeof operator.

See Also

C# Keywords | Value Types | Default Values Table | Formatting Numeric Results Table | Types Reference Tables