Could not load type 'Microsoft.EntityFrameworkCore.RelationalReferenceCollectionBuilderExtensions'

'Microsoft.EntityFrameworkCore.Infrastructure.IDbContextFactory`1[TContext]' violates the constraint of type parameter 'TContext'

Try adding a database initializer to your context: ...Edit: My initial answer was based on Entity Framework 6. Database.EnsureCreated() sounds like it might be the equivalent method in the latest release:... public Context(DbContextOptions<Context> options) : base(options) { Database.EnsureCreated(); }

Could not load type 'Microsoft.Extensions.DependencyInjection.ServiceProviderExtensions'

try putting this... { "projects": [ "src", "test" ], "sdk": { "version": "1.0.0-rc1-final" } } ...in global.json

Microsoft.EntityFrameworkCore.Design' has different version then 'Microsoft.EntityFrameworkCore.Tools'

Solved by installing of preview 2 of dotnet instead of preview 3.

How to resolve the dependency on Microsoft.EntityFrameworkCore.SqlServer and Microsoft.EntityFrameworkCore.Tools?

I think is because you are missing Microsoft.EntityFrameworkCore, try this:... "dependencies": { "Microsoft.NETCore.App": { "version": "1.0.0", "type": "platform" }, "Microsoft.EntityFrameworkCore": "1.0.1", "Microsoft.EntityFrameworkCore.SqlServer": "1.0.1", "Microsoft.EntityFrameworkC...

Could not load assembly Microsoft.EntityFrameworkCore.Design when running Add-Migration

It worked after adding Microsoft.EntityFrameworkCore.Tools.DotNet and changing the versions of dotnet tools to 1.0.0-msbuild2-final, now my .csproj is:...<Project Sdk="Microsoft.NET.Sdk"> <PropertyGroup> <TargetFramework>netcoreapp1.1</TargetFramework> </PropertyGroup> <ItemGroup> <PackageReference Include="Microsoft.EntityFramework...

The type or namespace name 'Relational' does not exist in the namespace 'Microsoft.EntityFrameworkCore'

Microsoft.EntityFrameworkCore.Relational... is ...assembly.... There is no such ...namespace... in EF Core....The ...FromSql... method is defined in the ...Microsoft.EntityFrameworkCore... namespace, ...RelationalQueryableExtensions... class, so all you need to get access to it is the typical...using Microsoft.EntityFrameworkCore;

Type not found Microsoft.EntityFrameworkCore in .NET Standard project

Try to add this into your .csproj file which contains reference to the ...Microsoft.EntityFrameworkCore.SqlServer...<PropertyGroup> <AutoGenerateBindingRedirects>true</AutoGenerateBindingRedirects> <GenerateBindingRedirectsOutputType>true</GenerateBindingRedirectsOutputType> <CopyLocalLockFileAssemblies>true</CopyLocalLockFileAssemblies> </Pr...

System.TypeLoadException Could not load type 'Microsoft.EntityFrameworkCore.Query.RelationalQueryContextFactory'

My bad....Seems .Net core 3 is not yet supported by linq2db.EntityFrameworkCore....Seems no option other than going back to old or wait....Reference: ...https://github.com/linq2db/linq2db.EntityFrameworkCore/issues/18

System.IO.FileNotFoundException: Could not load file or assembly 'Microsoft.EntityFrameworkCore, Version=2.2.0.0,

I have some ideas. Firstly check, if the folder that you want to refer allows the Visual to have access....If it do not work, try reinstaling packages through nugget (If I remember correctly I had this same error.). If it shows that its not installed in nugget manager, just install it, even a few times....Here is the anwser for your question at the...

Method 'get_Info' in type 'Microsoft.EntityFrameworkCore.SqlServer.Infrastructure.Internal.SqlServerOptionsExtension

I added the following packages and the issue was solved...Microsoft.EntityFrameworkCore.SQLServer (3.1.2) and Microsoft.EntityFrameworkCore (3.1.2) ...Interesting that I got a runtime error not a build error.