Why Error 120?

[annettes]

I am using the List data structure found in System.Collections.Generic, and using predicates with List.FindIndex and List.ForEach. For each of the public fields or methods in the predicates, such as CurrentBar, TickSize, ExitShort etc, I get the error message: 'An object reference is required for the non-static field, method or property x'. This error only appeared after adding 'using System.Collections.Generic'. Can you tell me what I am doing wrong please? How do I reference these fields more specifically and why do I need to? Code is attached.
Thanks

[annettes]

Don't worry, I solved it by removing the word static from the definition of the predicate functions. However, all the examples on the MSDN website use static in the function definition.