Could Not Load File Or Assembly System.Runtime.CompilerServices.Unsafe
Answer : Could not load file or assembly System.Runtime.CompilerServices.Unsafe It seems that you have installed System.Runtime.CompilerServices.Unsafe nuget package 4.5.3 version. And it corresponds to System.Runtime.CompilerServices.Unsafe.dll assembly version 4.0.4.1 . Suggestion 1) Please try to register System.Runtime.CompilerServices.Unsafe version 4.0.4.1 into GAC so that the system can it. Run Developer Command Prompt for VS2019 as Administrator type: cd xxxxx (the path of the the System.Runtime.CompilerServices.Unsafe 4.0.4.1) gacutil /i System.Runtime.CompilerServices.Unsafe.dll 2) If you use Net Framework projects with xxx.config file, you could use bindingRedirect. Add these in app.config file or web.config file: <configuration> <runtime> <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1"> <dependentAssembly> <assemblyIdentity name="System.Runtime.CompilerServices.Unsafe" ...