Add project files.

WindowsFormsCore/Domain/LottoNum.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace WindowsFormsCore.Domain
+{
+    public class LottoNum
+    {
+        public int ChoseNumber { get; set; }
+        public bool Valid { get; set; }
+    }
+}