In Asp.net Difference between ""(empty string) and String.Empty

What is the difference between String.Empty and "" (empty string):

In Asp.net created String is an object of String Class.

String str=”” Creates an object 

And

String.Empty creates no object.

So it is more efficient to use String.Empty.

Source of information

.Length == 0 is the fastest option,

But .Empty makes for slightly cleaner code.

So "" is pretty equivalent to .Empty, but still not as fast as .Length == 0.

string.Empty doesn't create an object while "" creates a string object.

Difference between Empty String and Null value string:

Null is an absence of a value. An empty string is a value, but is just empty.

Null is special to a database.

The difference between '1' and "1" for in a database query is that the SQL syntax supports '1' for SQL queries, but doesn't use "1".

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