private static int[,] Arr2FromConsole(bool square)
 {
     while (true)
     {
         try
         {
             Console.WriteLine("введите двумерный массив");
             StringBuilder sb = new StringBuilder();
             string        t  = "";
             do
             {
                 t = Console.ReadLine();
                 sb.AppendLine(t);
             } while (t != "");
             int[,] arr2 = Array2Convert.StrToArr2(sb.ToString());
             if (square && arr2.GetLength(0) != arr2.GetLength(1))
             {
                 throw new Exception("двумерный массив не квадратный");
             }
             return(arr2);
         }
         catch (Exception ex)
         {
             Console.WriteLine(ex.Message);
         }
     }
 }
 private static void Arr2ToConsole(int[,] arr2)
 {
     Console.WriteLine(Array2Convert.Arr2ToStr(arr2));
 }