添加Lesson20

C#进阶/Lesson20_反射练习/Lesson20_反射练习.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#进阶/Lesson20_反射练习/Program.cs

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+using System.Reflection;
+
+namespace Lesson20_反射练习
+{
+    class Program
+    {
+        static void Main(string[] args)
+        {
+            Assembly assembly = Assembly.LoadFrom(@"D:\VisualStudio2022\VisualStudio Programe\C#\C#进阶\反射练习库\bin\Debug\反射练习库.dll");
+            Type[] types = assembly.GetTypes();
+            Console.WriteLine("______________");
+            for (int i = 0; i < types.Length; i++)
+            {
+                Console.WriteLine(types[i]);
+            }
+            Console.WriteLine("______________");
+            Type player = assembly.GetType("反射练习库.Player");
+            
+            object obj = Activator.CreateInstance(player);
+            Console.WriteLine(obj);
+        }
+    }
+}