CLR VIA C #: Primitive types, reference types, and value types

The difference between a primitive type, a reference type, and a value type;

1. Primitive type (primitive type): The data type directly supported by the compiler, and primitive types directly mapped to types that exist in the FCL.

C # Lowercase is a primitive type, for example: string, uppercase is the FCL type, such as String, primitive types are directly mapped to the FCL type, so there is no difference between the two, the same, not tangled in which way to use.

Supports direct use of the FCL type, does not use primitive type, Float corresponds to single FCL type; dynamic corresponds to System.Object FCL type;

2, C # default is overflow check off, operator checked() and unchecked() can control overflow check in a specific area;

CLR VIA C #: Primitive types, reference types, and value types