Project could not be opened because the Visual C# 2019

For this particular issue, I searched some solutions below, hope they will helpful:

1. Go to Control Panel -> Programs and Features -> Turn Windows Features on or off, inside that, we had to select Internet Information Services -> Web Management Tools -> IIS 6 Management Compatibility -> IIS Metabse and IIS 6 configuration compatibility.

2. Edit the web application’s project file with a text editor and change this line from True to False:

True

3. Grant IIS AppPool identity permissions to the %systemroot%\inetsrv\config

4.Run in command prompt: aspnet_regiis –i or aspnet_regiis.exe –ga

If the above doesn’t work, please use the devenv /log to start visual studio and log all activity to the log file. You can get the log file at: %APPDATA%\Microsoft\VisualStudio\Version\ActivityLog.xml, open it in the IE to see whether there are errors. Refer to: https://msdn.microsoft.com/en-us/library/xee0c8y7.aspx?f=255&MSPPError=-2147217396

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Madan Shekar7y ago
For this particular issue, I searched some solutions below, hope they will helpful:
1. Go to Control Panel -> Programs and Features -> Turn Windows Features on or off, inside that, we had to select Internet Information Services -> Web Management Tools -> IIS 6 Management Compatibility -> IIS Metabse and IIS 6 configuration compatibility.
2. Edit the web application’s project file with a text editor and change this line from True to False:
True
3. Grant IIS AppPool identity permissions to the %systemroot%\inetsrv\config
4.Run in command prompt: aspnet_regiis –i or aspnet_regiis.exe –ga
If the above doesn’t work, please use the devenv /log to start visual studio and log all activity to the log file. You can get the log file at: %APPDATA%\Microsoft\VisualStudio\Version\ActivityLog.xml, open it in the IE to see whether there are errors. Refer to: https://msdn.microsoft.com/en-us/library/xee0c8y7.aspx?f=255&MSPPError=-2147217396
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