Testing for an empty string

[Edward Diener]

Is there some obscure reason why there is no System.String.IsEmpty() method
to test for an empty string rather than the more verbose
System.String.Length == 0 ?

 

[Ed Kaim [MSFT]]

From http://www.dotnet247.com/247reference/msgs/16/83736.aspx you can do any
of these:

str == ""
str.Equals("")
str == string.empty
str.Equals(string.empty)
str.Length == 0

 

[Nick Wienholt]

FxCop flags everything except str.Length == 0 as a perf issue. The
performance hit of the other techniques isn't great, but, given the results
of all technique are identical, I'd favour the zero length check.

Nick Wienholt, MVP
Maximizing .NET Performance
http://www.apress.com/book/bookDisplay.html?bID=217
Sydney Deep .NET User Group www.sdnug.org