Synchronization of old projects

Part1

C#入门/Lesson11_练习题/Program.cs

@@ -0,0 +1,23 @@
+using System;
+namespace lesson11
+{
+    class program
+    {
+        static void Main(string[] args)
+        {
+            #region 1
+            string customerName = "张三";
+            Console.WriteLine("你好"+customerName);
+
+            Console.WriteLine("你好{0}", customerName);
+
+            string str = string.Format("你好{0}", customerName);
+            Console.WriteLine(str);
+            #endregion
+
+            #region 2
+
+            #endregion
+        }
+    }
+}