修正第1题

data/1..NET初阶/1.入门/1.Hello World/HelloWorld.md

 # Hello World
 
+访问链接安装适合自己机器的 .NET 6 环境: https://docs.microsoft.com/zh-cn/dotnet/core/install/
 
-以下 `Hello World` 程序中，能够正确输出内容的是：
-
-## 控制台
-
-### 运行
+运行下面的命令创建项目，编写第1个.NET 6 C# 程序:
 
 ```bash
-
 dotnet new console --output sample1
 dotnet run --project sample1
-
 ```
 
+以下程序中，不能正确输出`"Hello,World!"`内容的是：
+
 ## 答案
 
 ```csharp
-
-Console.WriteLine("Hello, World!");
-
+var str1 = "Hello,";
+var str2 = "World!";
+Console.WriteLine("str1"+"str2");
 ```
 
 ## 选项
@@ -27,24 +24,20 @@ Console.WriteLine("Hello, World!");
 ### A
 
 ```csharp
-
-System.out.printf("Hello World");
-
+var str1 = "Hello,";
+var str2 = "World!";
+Console.WriteLine(str1+str2);
 ```
 
 ### B
 
 ```csharp
-
-println("Hello World");
-
+Console.WriteLine("Hello, World!");
 ```
 
 ### C
 
 ```csharp
-
-Console.WriteLine("Hello, World!");
-
-```
+var str = "Hello," + "World!"
+Console.WriteLine(str);
+```
\ No newline at end of file
-

data/1..NET初阶/1.入门/1.Hello World/sample1/Program.cs

 // See https://aka.ms/new-console-template for more information
-Console.WriteLine("Hello, World!");
+var str1 = "Hello,";
+var str2 = "World!";
+Console.WriteLine(str1+str2);