Unhandled Exception: System.MissingMethodException: Entry point not found in assembly 'Microsoft.EntityFrameworkCore.Design, Version=1.1.0.0, Culture=neutral, PublicKeyToken=adb9793829ddae60'.

Hi,

I am getting this following error for while creating "add-migration InitialCreate" :

Unhandled Exception: System.MissingMethodException: Entry point not found in assembly 'Microsoft.EntityFrameworkCore.Design, Version=1.1.0.0, Culture=neutral, PublicKeyToken=adb9793829ddae60'.

This is my project.json file :

{"dependencies": {"Microsoft.AspNetCore.Diagnostics": "1.0.0","Microsoft.AspNetCore.Identity.EntityFrameworkCore": "1.1.0-preview1-final","Microsoft.AspNetCore.Mvc": "1.0.1","Microsoft.AspNetCore.Mvc.TagHelpers": "1.1.1","Microsoft.AspNetCore.Mvc.ViewFeatures": "1.1.1","Microsoft.AspNetCore.Server.IISIntegration": "1.0.0","Microsoft.AspNetCore.Server.Kestrel": "1.0.1","Microsoft.AspNetCore.StaticFiles": "1.1.0","Microsoft.EntityFrameworkCore.Design": {"version": "1.1.0-preview1-final","type": "build"
    },"Microsoft.EntityFrameworkCore.SqlServer": "1.0.1","Microsoft.Extensions.Configuration.FileExtensions": "1.0.0","Microsoft.Extensions.Configuration.Json": "1.0.0","Microsoft.Extensions.Logging.Console": "1.0.0","Microsoft.NETCore.App": {"version": "1.0.1","type": "platform"
    }
  },"tools": {"Microsoft.AspNetCore.Server.IISIntegration.Tools": {"version": "1.0.0-preview2-final","imports": ["portable-net45+win8+dnxcore50"

      ]
    },
    "Microsoft.EntityFrameworkCore.Tools": {"version": "1.0.0-preview2-final","imports": ["portable-net45+win8+dnxcore50","portable-net45+win8"
      ]
    }
  },"frameworks": {"netcoreapp1.0": {"imports": ["dotnet5.6","portable-net45+win8"
      ]
    }
  },"buildOptions": {"emitEntryPoint": true,"preserveCompilationContext": true
  },"runtimeOptions": {"configProperties": {"System.GC.Server": true
    }
  },"publishOptions": {"include": ["wwwroot","web.config"
    ]
  },"scripts": {"postpublish": [ "dotnet publish-iis --publish-folder %publish:OutputPath% --framework %publish:FullTargetFramework%" ]
  }
}

NB : I tried to change the version of framework tool but it's again create other errors like"dependency conflict".