calling + definition

//wc
CountWhat what;
Console.WriteLine(tools.Wc(filename, what));
//grep
List <string> Lines = tools.Grep(filename, searchText);
while (i < Lines.Count)
                    {
                        Console.Write(Lines[i]);
                        i++;
                    }

//definition of what :
public enum CountWhat
    {
        l = 0,
        w = 1
    }