>In the validate generic method I create a list of T rows that get passed into the validate column functionality. The validate columns then passes this generic collection to a couple of tryConvert routines depending on data type.
>
>The problem is that I can send the rows collection to the TryConvertValue method just fine and it runs perfectly. I send the same collection with the same parameters into TryValidateStringLength, and I get the following compile time error:
>
>"Argument type 'System.Collections.Generic.IEnumerable(T)' is not assignable to parameter type 'System.Collections.Generic.IEnumerable(T)'
>
>This editor strips generic symbols from the code, so I'm attaching png's of the methods..

You missed the 'T' when defining the TryValidateStringLength method (The red T in the first parameter should have been a clue :-})