>>>It was you that started with Contains, if memory serves
>>>
>>>But anyway http://msdn.microsoft.com/en-us/library/czz5hkty.aspx
>>>
>>>Arrays implement the IEnumerable interface. http://msdn.microsoft.com/en-us/library/vstudio/9eekhta0(v=vs.100).aspx
>>> IEnumerable contains Contains.
>>>
>>> Hence, ...
>>
>>I needed to add
>>
>>using System.Linq
>>
>>for the above implementation to compile. And so far it worked great.
>
>
>Every new class adds system.linq automatically

Right - this one was existing class already and it only had using System. I added this inlist function and the Linq using.