Visual Studio 2017 problem with .net core projects

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I have a big problem with vs 2017. When vs2017 was open, suddenly unload my .net core project (presentaion layer, specially nop.web for nopCommerce 4.2).
I really tired for to much installing and unistalling sdks and vs2017.
I update vs2017, uninstall sdk and reinstall sdk (I know 2.2.2nn is not support so I install SDK 2.2.110).
It also create empty solution when I try to create new web (.net core) project. In fact it has create but doesn't display in vs2017. This problem is persists with .net core 2.1.
Nuget doesn't open in project, and also in error list I have this Error: The current .NET SDK does not support targeting .NET Core 2.2.
But every things is ok in vs2019

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