修改

ConsoleApp2/Helpers/ValidateConsole.cs

@@ -0,0 +1,31 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ConsoleApp2.Helpers
+{
+    public static class ValidateConsole
+    {
+      public static void ValidateInput<T>(Func<string,bool> converter,string message)
+        {
+            Console.Write(message);
+           string ? input = Console.ReadLine();
+            while (true)
+            {
+                if (!string.IsNullOrEmpty(input))
+                {
+                    var result = converter(input);
+                    if (result == false)
+                    {
+                        Console.WriteLine($"输入的内容不合法,请重新输入!");
+                        input = Console.ReadLine();
+                    }
+                    else break;
+                }
+                break;
+            }
+        }
+    }
+}