添加项目文件。

MSUtils/TestClass.cs

@@ -0,0 +1,20 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MSUtils
+{
+    public class TestClass
+    {
+        /// <summary>
+        /// 测试异常
+        /// </summary>
+        /// <exception cref="NullReferenceException"></exception>
+        public static void NullException()
+        {
+            throw new NullReferenceException("test exception in reference");
+        }
+    }
+}