ReadInt

using System;
using System.Collections.Generic;
using System.Collections.Specialized;
using System.Diagnostics.CodeAnalysis;
using System.Dynamic;
using System.Globalization;
using System.Linq;
using System.Runtime.Serialization;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using System.IO;
namespace CSLight
{
    class Program
    {
        static void Main(string[] args)
        {
            int number = ReadInt();
            Console.WriteLine($"{number} является числом.");
        }
        static int ReadInt()
        {
            int number;
            string command = "";
            while (!int.TryParse(command, out number))
            {
                Console.Write("Введите число:");
                command = Console.ReadLine();
                Console.Clear();
            }
            return number;
        }
    }
}