Я создаю приложение WPF с версией EntityFrameworkCore 2.2.2
Однако, когда я хочу Add-Migration
, выводится сообщение об ошибке ...
Your startup project 'project' doesn't reference Microsoft.EntityFrameworkCore.Design. This package is required for the Entity Framework Core Tools to work. Ensure your startup project is correct, install the package, and try again.
Я не знаю, почему это происходит, потому что я могу использовать его до появления этой ошибки.
Это мой packages.config
файл
<?xml version="1.0" encoding="utf-8"?>
<packages>
<package id="Costura.Fody" version="3.3.2" targetFramework="net461" />
<package id="Fody" version="4.0.2" targetFramework="net461" developmentDependency="true" />
<package id="Microsoft.CSharp" version="4.5.0" targetFramework="net461" />
<package id="Microsoft.Data.Sqlite.Core" version="2.2.2" targetFramework="net461" />
<package id="Microsoft.DotNet.PlatformAbstractions" version="2.1.0" targetFramework="net461" />
<package id="Microsoft.EntityFrameworkCore" version="2.2.2" targetFramework="net461" />
<package id="Microsoft.EntityFrameworkCore.Abstractions" version="2.2.2" targetFramework="net461" />
<package id="Microsoft.EntityFrameworkCore.Analyzers" version="2.2.2" targetFramework="net461" />
<package id="Microsoft.EntityFrameworkCore.Design" version="2.2.2" targetFramework="net461" />
<package id="Microsoft.EntityFrameworkCore.Relational" version="2.2.2" targetFramework="net461" />
<package id="Microsoft.EntityFrameworkCore.Sqlite" version="2.2.2" targetFramework="net461" />
<package id="Microsoft.EntityFrameworkCore.Sqlite.Core" version="2.2.2" targetFramework="net461" />
<package id="Microsoft.EntityFrameworkCore.Tools" version="2.2.2" targetFramework="net461" developmentDependency="true" />
<package id="Microsoft.Extensions.Caching.Abstractions" version="2.2.0" targetFramework="net461" />
<package id="Microsoft.Extensions.Caching.Memory" version="2.2.0" targetFramework="net461" />
<package id="Microsoft.Extensions.Configuration" version="2.2.0" targetFramework="net461" />
<package id="Microsoft.Extensions.Configuration.Abstractions" version="2.2.0" targetFramework="net461" />
<package id="Microsoft.Extensions.Configuration.Binder" version="2.2.0" targetFramework="net461" />
<package id="Microsoft.Extensions.DependencyInjection" version="2.2.0" targetFramework="net461" />
<package id="Microsoft.Extensions.DependencyInjection.Abstractions" version="2.2.0" targetFramework="net461" />
<package id="Microsoft.Extensions.DependencyModel" version="2.1.0" targetFramework="net461" />
<package id="Microsoft.Extensions.Logging" version="2.2.0" targetFramework="net461" />
<package id="Microsoft.Extensions.Logging.Abstractions" version="2.2.0" targetFramework="net461" />
<package id="Microsoft.Extensions.Options" version="2.2.0" targetFramework="net461" />
<package id="Microsoft.Extensions.Primitives" version="2.2.0" targetFramework="net461" />
<package id="Newtonsoft.Json" version="9.0.1" targetFramework="net461" />
<package id="Remotion.Linq" version="2.2.0" targetFramework="net461" />
<package id="SQLitePCLRaw.bundle_green" version="1.1.12" targetFramework="net461" />
<package id="SQLitePCLRaw.core" version="1.1.12" targetFramework="net461" />
<package id="SQLitePCLRaw.lib.e_sqlite3.linux" version="1.1.12" targetFramework="net461" />
<package id="SQLitePCLRaw.lib.e_sqlite3.osx" version="1.1.12" targetFramework="net461" />
<package id="SQLitePCLRaw.lib.e_sqlite3.v110_xp" version="1.1.12" targetFramework="net461" />
<package id="SQLitePCLRaw.provider.e_sqlite3.net45" version="1.1.12" targetFramework="net461" />
<package id="System.Buffers" version="4.4.0" targetFramework="net461" />
<package id="System.Collections.Immutable" version="1.5.0" targetFramework="net461" />
<package id="System.ComponentModel.Annotations" version="4.5.0" targetFramework="net461" />
<package id="System.Diagnostics.DiagnosticSource" version="4.5.0" targetFramework="net461" />
<package id="System.Interactive.Async" version="3.2.0" targetFramework="net461" />
<package id="System.Memory" version="4.5.1" targetFramework="net461" />
<package id="System.Numerics.Vectors" version="4.4.0" targetFramework="net461" />
<package id="System.Runtime.CompilerServices.Unsafe" version="4.5.1" targetFramework="net461" />
<package id="System.Runtime.InteropServices.RuntimeInformation" version="4.0.0" targetFramework="net461" />
</packages>
Пакетуже установлен.
![NuGet Package Manager](https://i.stack.imgur.com/yB5Im.png)
Большое спасибо за любую помощь.