You can count the number of constants defined in a C# enumeration with the static Enum.GetNames method. This returns an Array containing the names of the constants defined in the enumeration. You can then check the Array’s Length property.
C# includes a number of pre-defined “built-in” data types. Each built-in data type is represented by a class in the System namespace that inherits from the base System.Object class. For example, an integer is represented by the System.Int32 class, and a string is represented by the System.String class.
C# defines an alias keyword for each built-in type. The alias keyword and its corresponding C# type are interchangeable. For example, you can define a string with the “string” keyword or “System.String” type:
