Compilation error (line 35, col 20): 'Pixel' does not contain a definition for 'IsGreen' and no extension method 'IsGreen' accepting a first argument of type 'Pixel' could be found (are you missing a using directive or an assembly reference?)
Compilation error (line 38, col 20): 'Pixel' does not contain a definition for 'IsBlue' and no extension method 'IsBlue' accepting a first argument of type 'Pixel' could be found (are you missing a using directive or an assembly reference?)
Compilation error (line 23, col 31): The name 'N' does not exist in the current context