Difference between string and string

From the perspective of location:

1. String is the string in. NET Framework, and the string in lower case is the string in C.

2. If using system is deleted, there will be no upper-case strings. System is a function name of the. NET Framework class library.

In terms of nature:

1. string is a keyword, string is a class, and string cannot be used as a class, structure, enumeration, field, variable, method, or attribute name.
2. Write in C #CodeIn this case, try to use a lower-case string, which is more in line with the C # code specification. If efficiency is pursued, you can use a upper-case string, because after compilation, lowercase strings are converted to uppercase strings, which can be compiled to reduce the load and improve the running efficiency.

3. string type indicates a Unicode character string. String is the alias of the. NET Framework string. It is more intuitive to test the equality of strings.