我的天，找到安装的。net框架的版本有这么多麻烦?

Windows >搜索> Visual Studio Installer >为已安装的VS版本，点击更多>修改>单个组件，并在那里看到它:

MSDN详细介绍了如何从注册表中检查它:

To find .NET Framework versions by viewing the registry (.NET Framework 1-4) On the Start menu, choose Run. In the Open box, enter regedit.exe.You must have administrative credentials to run regedit.exe. In the Registry Editor, open the following subkey: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\NET Framework Setup\NDP The installed versions are listed under the NDP subkey. The version number is stored in the Version entry. For the .NET Framework 4 the Version entry is under the Client or Full subkey (under NDP), or under both subkeys. To find .NET Framework versions by viewing the registry (.NET Framework 4.5 and later) On the Start menu, choose Run. In the Open box, enter regedit.exe. You must have administrative credentials to run regedit.exe. In the Registry Editor, open the following subkey: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\NET Framework Setup\NDP\v4\Full Note that the path to the Full subkey includes the subkey Net Framework rather than .NET Framework Check for a DWORD value named Release. The existence of the Release DWORD indicates that the .NET Framework 4.5 or newer has been installed on that computer.

注意:上面快照中被剪切的最后一行在所有其他操作系统版本上为:461310。我尽我最大的努力避免在截屏时信息被剪切，但表格太大了。

如果你在你的机器上安装了visual studio，

关于Microsoft Visual Studio，请访问帮助>

你会看到IDE正在使用的。net版本的信息。

. net Version Detector是一个GUI实用程序，用于显示框架的六个(!)版本中哪个被安装了。

打开CMD提示符类型:

dotnet --info

在CMD下执行以下命令:

dotnet——list-sdks

它将显示所有已安装的。net版本，如上图所示。你也可以运行下面的命令来查看正在使用的。net版本:

dotnet——版本