How to manufacture an empty string in .NET?

Question

I have written a piece of optimized code that contains special cases for null and empty strings. I am now trying to write a unit test for this code. In order to

Answer 1

You can use the Obsolete method String.Copy

string s1 = "";
string s2 = String.Copy("");
Assert.IsTrue(s1.Length == 0 && s2.Length == 0);
Assert.IsTrue(!ReferenceEquals(s1, s2));