diff --git "a/WPFTest\347\216\257\345\242\203\351\205\215\347\275\256.md" "b/WPFTest\347\216\257\345\242\203\351\205\215\347\275\256.md"
index cdbb98e90fa36ffa227f5c32b0605b5617f23419..d2bd283290d7a55381c42b1991a220330ae5934b 100644
--- "a/WPFTest\347\216\257\345\242\203\351\205\215\347\275\256.md"
+++ "b/WPFTest\347\216\257\345\242\203\351\205\215\347\275\256.md"
@@ -68,4 +68,34 @@ xcopy "$(SolutionDir)WPFTest\Files\*.*"  "$(TargetDir)Files\"  /y
 
 ③安装完成  
 
-![image8](images/8.png)
\ No newline at end of file
+![image8](images/8.png)
+
+## 4 vs无法识别成功安装的.net框架  
+①vs无法识别安装的框架 
+
+在vs2022的下载中已经安装了.net 4.8
+![image4.1](images/4.1.png)
+
+但是打开打开项目时显示缺少目标框架
+![image4.2](images/4.2.png)
+生成项目时显示因为缺少调试目标无法调试，无法找到"System"命名空间
+![image4.3](images/4.3.png)
+![image4.4](images/4.4.png)
+打开项目属性发现目标框架中无法识别.net 4.8
+![image4.5](images/4.5.png)
+但是在注册表中发现我们已经成功下载了.net 4.8
+![image4.6](images/4.6.png)
+
+②将对应文件拷贝
+
+打开注册器，发现vs是从"D:\Program Files (x86)\Reference Assemblies" loading  .net framework
+![image4.7](images/4.7.png)
+
+但是.net框架是下载到" C:\Program Files (x86)\Reference Assemblies"。因此vs找不到下载好的.net
+
+![image4.8](images/4.8.png)
+
+将C盘上图对应的文件夹.NETFramework复制到D盘对应的位置即可
+![image4.9](images/4.9.png)
+重启vs，可以识别。如果无法重新生成，以管理员身份运行即可。
+![image4.10](images/4.10.png)
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