using System;

public class Program

{

    public static void Main()

    {

            char ch1;

            int upper = 0;

            string name;

            input1: Console.WriteLine("Please enter name");

            name = Console.ReadLine();

            if (name.Length == 0){

                Console.WriteLine("! Name cannot be left blank !");

                goto input1;

            }

            for (int i = 0; i < name.Length; i++)

            {

            ch1 = name[i];

            if (char.IsNumber(ch1)){

                Console.WriteLine("! Thats not a name !");

                goto input1;

            }

            if (char.IsSymbol(ch1)){

                Console.WriteLine("! Thats not a name !");

                goto input1;

            }   

            if (char.IsUpper(ch1)){

                upper ++;

            }

            if (upper >= 2 ){

                Console.WriteLine("! Too many uppercases used !");

                Console.WriteLine("! Max = 1 !");

                Console.WriteLine("");

                goto input1;

            }

        }

    }

}

​