How can I use these statement properly?

Question

// Windows CE Fn Keys
alKeys.Add(Convert.ToInt32(Keys.F7));   // "F7" key
alKeys.Add(Convert.ToInt32(Keys.F8));   // "F8" key
alKeys.Add(Convert.ToInt32(Keys.F9));   // "SCAN" key
alKeys.Add(Convert.ToInt32(Keys.F19));  // Gun trigger

I'm trying to call a method like this:

  if((alKeys.Add(Convert.ToInt32(Keys.F9))==true))
  {
       rfid.SetCallback(new RfidCallbackProc(myRfidCallback));
       //this is the method i am calling

   };   // "SCAN" key

But I got this error:

Error 1 Operator '==' cannot be applied to operands of type 'int' and 'bool' SmartDeviceProject1

So how to do it properly?

Answer 1

if((alKeys.Contains(Convert.ToInt32(Keys.F9))==true))