An object reference is required for the non-static field, method, or property !? :(

[C# Programming]

Hey guys, I know this is simple stuff still would appreciate ur help, I assumed by declaring this method static It would solve the problem but hasn't ... http://www.barakasoft.com/script/Forums/Images/smiley_frown.gif
I get this error: An object reference is required for the non-static field, method, or property
public string _variable = String.Empty;
public static string Variable
{
set { _variable = value; }
get { return _variable; }
}