本文介绍了无法加载类型的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
首先，我感谢您的光临，我希望即使英语破译，您也能理解我:
First of all i thank you on your time and i hope that you can understand me even with English as broken as this one:
试图重新安装所有软件包，手动放置引用，重新启动PC，重新启动VS2019，甚至启动了新项目，但仍然存在错误.
Tried to reinstall all packages, to manually put references, restarted PC,restarted VS2019 and even started new project but still error is there again.
我一直此处但这没有帮助.
services.AddDbContext<ApplicationDbContext>(options =>
options.UseSqlServer(
Configuration.GetConnectionString("DefaultConnection")));
-.csproj
<Project Sdk="Microsoft.NET.Sdk.Web">
<PropertyGroup>
<TargetFramework>netcoreapp3.0</TargetFramework>
<UserSecretsId>aspnet-ZavrsniRad01-F04B6A7E-6450-4254-8092-F42843F4615A</UserSecretsId>
</PropertyGroup>
<ItemGroup>
<PackageReference Include="Microsoft.AspNetCore.Diagnostics.EntityFrameworkCore" Version="3.0.0-preview6.19307.2" />
<PackageReference Include="Microsoft.AspNetCore.Identity.EntityFrameworkCore" Version="3.0.0-preview6.19307.2" />
<PackageReference Include="Microsoft.AspNetCore.Identity.UI" Version="3.0.0-preview6.19307.2" />
<PackageReference Include="Microsoft.EntityFrameworkCore.SqlServer" Version="3.0.0-preview.18572.1" />
<PackageReference Include="Microsoft.EntityFrameworkCore.Tools" Version="3.0.0-preview6.19304.10" />
<PackageReference Include="Microsoft.Extensions.Logging.Debug" Version="3.0.0-preview6.19304.6" />
<PackageReference Include="Microsoft.VisualStudio.Web.CodeGeneration.Design" Version="3.0.0-preview6-19319-03" />
</ItemGroup>
</Project>
推荐答案
显然，我必须安装EntityFrameworkCore.SqlServer Preview6才能解决此错误
Apparently i had to install EntityFrameworkCore.SqlServer preview6 to solve this error
Install-Package Microsoft.EntityFrameworkCore.SqlServer -Version 3.0.0-preview6.19304.10
这篇关于无法加载类型的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！