C# type check
- C# type check generic
- C# type check inheritance
- C# type check and cast
- C# type check if implements interface
- C# type check performance
- C# type check if nullable
- C# type checking performance
- C# type check interface
- C# type check is not
- C# type check switch
- C# check type of variable
- C# check type of exception
- C# check type of generic parameter
- C# check type is enum
- C# check type is string