Difference between string and string in C #

1. String is the class in C #, and string is the class of. NET Framework (blue is not displayed in C # IDE );

2. C # string ing is the string of. NET Framework;

3. If a string is used, the compiler will compile it into a string. Therefore, if a string is used directly, the compiler will do less work;

4. If C # is used, we recommend that you use string to conform to the specifications;

5. String always represents system. String (1.x) or: system. String (2.0 );

6. String indicates system. String only when using system; is in front and the namespace does not contain the string type (class, struct, Delegate, Enum;

7. string is a keyword, and string is not. That is to say, string cannot be the name of a class, structure, enumeration, field, variable, method, or attribute, but string can;