Synchronization of old projects

Part1

C#入门/Lesson8_显式转换联系/Lesson8_显式转换练习.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net8.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+</Project>

C#入门/Lesson8_显式转换联系/Program.cs

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+using System;
+namespace Lesson8
+{
+    class program
+    {
+        static void Main(string[] args)
+        {
+            int num1 = 24069;
+            Console.WriteLine(Convert.ToChar(num1));
+
+            Console.WriteLine();
+
+            int shuXue, yuWen, yingYu;
+            string name;
+            Console.Write("请输入姓名：");
+            name = Console.ReadLine();
+            Console.Write("请输入数学成绩：");
+            shuXue = Convert.ToInt32(Console.ReadLine());
+            Console.Write("请输入语文成绩：");
+            yuWen = Convert.ToInt32(Console.ReadLine());
+            Console.Write("请输入英语成绩：");
+            yingYu = Convert.ToInt32(Console.ReadLine());
+
+            Console.WriteLine($"你的成绩如下:\n语文:{yuWen}\n数学:{shuXue}\n英语:{yingYu}");
+
+        }
+    }
+}