String A = "" and string a = string. Empty

String. Empty does not allocate storage space
"" Allocate a bucket with an empty Length
Therefore, we generally use string. Empty
For the sake of future cross-platform use string. Empty
In C #, "" And string. Empty Can be used interchangeably. For example:
String S = "";
String S2 = string. empty;
If (S = string. Empty ){
//
}
If statement is true
Several methods for determining as a Null String, in the order of performance from high to low:
S. Length = 0 is better than S = string. Empty is better than S = ""


About string. the problem with empty and null is that both of them indicate null strings, and one of them focuses on string str1 = string. the difference between empty and string str2 = NULL. After this definition, str1 is an empty string, and the empty string is a special string, except that the value of this string is null, in the memory, there is an accurate point. String str2 = NULL. After this definition, only a reference to the string class is defined, and str2 does not point to any place, if it is not instantiated before use, an error will be reported.

String A = "" and string a = string. Empty