How can I check a C variable is an empty string or null

Question

I am looking for the simplest way to do a check  I have a variable that can be equal to    or null  Is there just one function that can check if it s not    or null

User · Answer

Since  NET 2 0 you can use      Indicates whether the specified string is null or an Empty string  string IsNullOrEmpty string value     Additionally  since  NET 4 0 there s a new method that goes a bit farther      Indicates whether a specified string is null  empty  or consists only of white-space characters  string IsNullOrWhiteSpace string value

User · Answer

if the variable is a string  bool result   string IsNullOrEmpty variableToTest     if you only have an object which may or may not contain a string then   bool result   string IsNullOrEmpty variableToTest as string

User · Answer

if  string IsNullOrEmpty myString

User · Answer

string IsNullOrEmpty is what you want

User · Answer

Cheap trick   Convert ToString  object stringVar              This works because Convert ToString object  returns an empty string if object is null   Convert ToString string  returns null if string is null    Or  if you re using  NET 2 0 you could always using String IsNullOrEmpty

User · Answer

if  string IsNullOrEmpty myString

[c#] How can I check a C# variable is an empty string "" or null?

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