C# No overload for method 'BeOlvasBabok' takes 1 arguments

Hello,

It's a project in my school, I try to get a few dummy's position, and the direction, where they are going. I have to use methods, so I try to implement it in this way. I got the error here:

babok = BeOlvasBabok("tabla.be,b");

where tabla.be is the name of the file, and b is a short number, and babok is a byte[,].

And it's definition is:

 static byte[,] BeOlvasBabok(string filenev, short babszam)
         {
             byte[,] babok;
             babok = new byte[3, babszam];
             //first line reread, to start at the second line
             StreamReader sr = new StreamReader("tabla.be");
             string a = sr.ReadLine();
             for (int i = 0; i != babszam; i++)
             {
                 a = sr.ReadLine();
                 string[] c = a.Split(' ');
                 babok[0, i] = byte.Parse(c[0]);
                 babok[1, i] = byte.Parse(c[1]);
                 // converting the directions to numbers: down(l):1, up(f):2, right(j):3, left(b):4
                 switch (c[2])
                 {
                     case "l":
                     case "L":
                         babok[2, i] = 1;
                         break;
                     case "f":
                     case "F":
                         babok[2, i] = 2;
                         break;
                     case "j":
                     case "J":
                         babok[2, i] = 3;
                         break;
                     case "b":
                     case "B":
                         babok[2, i] = 4;
                         break;
                     default:
                         Console.WriteLine("Hiba a " + i + "-edik bevitt adatban!");
                         break;
                 }
                 sr.Close();
             }
             return babok;
         }

I found a few similiar problems here, but unfortunately can't figure out, have to use them in my solution.