Update README.md

README.md

@@ -1,6 +1,6 @@
 ![logo](https://raw.githubusercontent.com/NaBian/HandyControl/master/Resources/icon.png)
 
-![dotnet-version](https://img.shields.io/badge/.net-%3E%3D4.0-blue.svg) ![csharp-version](https://img.shields.io/badge/C%23-7.0-blue.svg) ![IDE-version](https://img.shields.io/badge/IDE-vs2017-blue.svg) [![nuget-version](https://img.shields.io/nuget/v/HandyControl.svg)](https://www.nuget.org/packages/HandyControl) [![build-status](https://ci.appveyor.com/api/projects/status/github/handyorg/handycontrol?svg=true)](https://ci.appveyor.com/project/handyorg/handycontrol) [![Join the chat at https://gitter.im/HandyControl/Lobby](https://badges.gitter.im/HandyControl/Lobby.svg)](https://gitter.im/HandyControl/Lobby?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge) [![qq-group](https://img.shields.io/badge/qq-714704041-red.svg)](//shang.qq.com/wpa/qunwpa?idkey=a571e5553c9d41e49c4f22f3a8b2865451497a795ff281fedf3285def247efc1)
+![dotnet-version](https://img.shields.io/badge/.net-%3E%3D4.0-blue.svg) ![csharp-version](https://img.shields.io/badge/C%23-7.3-blue.svg) ![IDE-version](https://img.shields.io/badge/IDE-vs2019-blue.svg) [![nuget-version](https://img.shields.io/nuget/v/HandyControl.svg)](https://www.nuget.org/packages/HandyControl) [![build-status](https://ci.appveyor.com/api/projects/status/github/handyorg/handycontrol?svg=true)](https://ci.appveyor.com/project/handyorg/handycontrol) [![Join the chat at https://gitter.im/HandyControl/Lobby](https://badges.gitter.im/HandyControl/Lobby.svg)](https://gitter.im/HandyControl/Lobby?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge) [![qq-group](https://img.shields.io/badge/qq-714704041-red.svg)](//shang.qq.com/wpa/qunwpa?idkey=a571e5553c9d41e49c4f22f3a8b2865451497a795ff281fedf3285def247efc1)
 [![wiki](https://img.shields.io/badge/wiki-Complete-brightgreen.svg)](https://github.com/ghost1372/HandyControl/wiki)
 
 # Welcome to HandyControl