c# - How to use regular expression with a string array -

i have string array

string [] ar = { "net" , "com" , "org"}; 

and want label writes "true" when user enter website example ends string in array

i tried this:

   private void timer1_tick(object sender, eventargs e)     {         foreach ( string ex in ar)         {             if (regex.ismatch(txtbox.text, @"^(www\.)([\w]+)\.(" + ex + ")$"))             {                 lbl.text = "true";             }             else             {                 lbl.text = "false";             }         }     } 

when write example "www.google.com", label still writes false. when write "www.google.org" label writes true.

you using foreach loop completing ittrations, when ittration compare condition remove control loop e.g. org @ last of array index thatswhy found @ last of lopp ittrations, edit code as.

 foreach ( string ex in ar)         {             if (regex.ismatch(txtbox.text, @"^(www\.)([\w]+)\.(" + ex + ")$"))             {                 lbl.text = "true";                 return;             }             else             {                 lbl.text = "false";             }         }