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README.md

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+##  dotNet版本问题
+
+### 1. 安装.Net4.0版本
+
+[.Net版本4.0版本下载:https://download.microsoft.com/download/9/5/A/95A9616B-7A37-4AF6-BC36-D6EA96C8DAAE/dotNetFx40_Full_x86_x64.exe](https://download.microsoft.com/download/9/5/A/95A9616B-7A37-4AF6-BC36-D6EA96C8DAAE/dotNetFx40_Full_x86_x64.exe)
+
+### 2.安装.Net4.52版本
+
+[.Net版本4.52下载:http://download.microsoft.com/download/E/2/1/E21644B5-2DF2-47C2-91BD-63C560427900/NDP452-KB2901907-x86-x64-AllOS-ENU.exe?desc=dotnet452](http://download.microsoft.com/download/E/2/1/E21644B5-2DF2-47C2-91BD-63C560427900/NDP452-KB2901907-x86-x64-AllOS-ENU.exe?desc=dotnet452)
+
+### 3.安装Access新版相关库
+
+[Access:http://download.microsoft.com/download/7/0/3/703ffbcb-dc0c-4e19-b0da-1463960fdcdb/AccessDatabaseEngine.exe](http://download.microsoft.com/download/7/0/3/703ffbcb-dc0c-4e19-b0da-1463960fdcdb/AccessDatabaseEngine.exe)
+
+
+
+### 下载页面
+
+> 上面地十不存在时,可以到下载页面去下载.
+
+[.Net4.0版本下载页面:https://www.microsoft.com/zh-cn/download/details.aspx?id=30653](https://www.microsoft.com/zh-cn/download/details.aspx?id=30653)
+
+[.Net4.52等下载页面:https://www.microsoft.com/net/framework/versions/net462?source=getdotnet&utm_source=getdotnet&utm_medium=referral](https://www.microsoft.com/net/framework/versions/net462?source=getdotnet&utm_source=getdotnet&utm_medium=referral)
+
+
+
 
 
 ## 要解决问题