Entity Framework Core
A lightweight, extensible, open-source, and cross-platform version of the Entity Framework data access technology.
696 questions
Error adding migrations: Failed to create CoreCLR, HRESULT: 0x80070057
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SoggyBottomBoy
6
Reputation points
I'm having an issue whereby I get the error message: Failed to create CoreCLR, HRESULT: 0x80070057 when I use any of the entity framework tooling.
I have 2 projects in my solution an ASP.NET Core (.NET 5) Web API and a .NET Standard 2.0 Class Library.
My intention is that my class library would contain the Models so that I can re-use these same models client side (and in a VSTO app which is .NET Framework 4.7.2). I'm stuck with .NET standard for the moment and can't move to .NET 5
It appears that the root cause of the issue is adding a project reference to the class library. Even with my models being stored in my ASP.NET project and me not referencing the class library with a using statement just having it as a reference results in the error. As soon as I remove the reference to my class library I have no problems... is there something I am missing?
{count} vote
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SoggyBottomBoy 6 Reputation points
2021-01-16T05:36:04.207+00:00 I have also checked in changing my class library to a .NET Core 3.1 library would resolve my issue and it does not.
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Rena Ni - MSFT 2,061 Reputation points2021-01-18T08:30:24.573+00:00 Hi @SoggyBottomBoy ,What about migrating your class library to .Net 5?
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SoggyBottomBoy 6 Reputation points
2021-01-19T19:41:59.927+00:00 @Rena Ni - MSFT I can not migrate to .NET 5 as I have a VSTO framework 4.7.2 project. VSTO does not have a .NET Core/.NET 5 implementation.
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Rena Ni - MSFT 2,061 Reputation points
2021-01-20T08:06:46.907+00:00 Hi @SoggyBottomBoy ,which ef core tool you use?And where did you use it?Also you use a VSTO app which is .NET Framework 4.7.2,why not using class library which is .NET Framework?
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