Auxilium_Server.Program.IsValidName C# (CSharp) Method

        static bool IsValidName(string name)
        {
            string n = name.ToUpper();

            for (int i = 0; i < name.Length; i++)
            {
                if (!(n[i] == 45 || n[i] == 95 || char.IsNumber(n[i]) || n[i] > 64 && n[i] < 91))
                    return false;
            }

            return true;
        }