Difference between IsNullOrEmpty and IsNullOrWhiteSpace in C#

Question

What are differences between these commands in C#

string text= "  ";
1-string.IsNullOrEmpty(text.Trim())

2-string.IsNullOrWhiteSpace(text)

Answer 1

• Source: MSDN

IsNullOrWhiteSpace is a convenience method that is similar to the following code, except that it offers superior performance:

return String.IsNullOrEmpty(value) || value.Trim().Length == 0;

White-space characters are defined by the Unicode standard. The IsNullOrWhiteSpace method interprets any character that returns a value of true when it is passed to the Char.IsWhiteSpace method as a white-space character.