Entity Framework Core: DbContextOptionsBuilder does not contain a definition for 'usesqlserver' and no extension method 'usesqlserver'

Question

I am new to EF core and I\'m trying to get it to work with my ASP.NET Core project.

I get the above error in my startup.cs when trying configure the

Answer 1

Install below NuGet Package will solve your issue

Microsoft.EntityFrameworkCore.SqlServer

Install-Package Microsoft.EntityFrameworkCore.SqlServer

Answer 2

In Visual Studio, check the NuGet Package Manager => Manage Packages for Solution, check all this packages, whether got installed in your solution or not, as below:

1. EntityFrameworkCore
2. Microsoft.EntityFrameworkCore
3. Microsoft.EntityFrameworkCore.InMemory
4. Microsoft.EntityFrameworkCore.Relational
5. Microsoft.EntityFrameworkCore.Sqlite.Core
6. Microsoft.EntityFrameworkCore.SqlServer
7. Microsoft.EntityFrameworkCore.Tools

I solved the same issues after check all the above packages have been installed.

Answer 3

Follow the steps below.

Install Entity Framework Core Design and SQL Server database provider for Entity Framework Core:

dotnet add package Microsoft.EntityFrameworkCore.Design
dotnet add package Microsoft.EntityFrameworkCore.SqlServer

Import Entity Framework Core:

using Microsoft.EntityFrameworkCore;

And configure your DbContext:

var connectionString = Configuration.GetConnectionString("myDb");
services.AddDbContext<MyDbContext>(options => 
    options.UseSqlServer(connectionString)
);

Answer 4

first add Install-Package Microsoft.EntityFrameworkCore.SqlServer

next add in your .cs file using Microsoft.EntityFrameworkCore;

finally add this in your core Startup.cs

  public void ConfigureServices(IServiceCollection services)
        {
            services.AddEntityFrameworkSqlServer().AddDbContext<ApplicationContext>(options => options.UseSqlServer(Configuration.GetConnectionString("MovieContext")));
        }

Answer 5

Install-Package:

**Microsoft.EntityFrameworkCore.SqlServer**

then add the top of your class:

**Microsoft.EntityFrameworkCore;**

that's worked for me

Answer 6

This is a known issue in the project system. See dotnet/project-system#1741