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说明
====
## 关于 共享框架
随着 .NET Core 3.0 的发布,许多 ASP.NET Core 程序集不再作为包发布到 NuGet。
相反,程序集包含在 Microsoft.AspNetCore.App 共享框架中,该框架随 .NET Core SDK 和运行时安装程序一起安装。
+ Web项目一般自动包含 AspMicrosoft.AspNetCore.App 共享框架,即 共享框架由项目的Sdk属性Microsoft.NET.Sdk.Web自动引入
```xml
<Project Sdk="Microsoft.NET.Sdk.Web">
<!--共享项目由上面Sdk类型Microsoft.NET.Sdk.Web自动引入-->
<PropertyGroup>
<TargetFramework>net7.0</TargetFramework>
<Nullable>enable</Nullable>
<ImplicitUsings>enable</ImplicitUsings>
</PropertyGroup>
<ItemGroup>
<!--Nuget包引用-->
<PackageReference Include="Microsoft.AspNetCore.OpenApi" Version="7.0.5" />
<PackageReference Include="Swashbuckle.AspNetCore" Version="6.4.0" />
</ItemGroup>
<ItemGroup>
<!--项目引用-->
<ProjectReference Include="..\xx.csproj" />
</ItemGroup>
</Project>
```
+ 类库项目等,要手动引入(无法使用nuget包的方式引入)
```xml
<Project Sdk="Microsoft.NET.Sdk">
<PropertyGroup>
<TargetFramework>net7.0</TargetFramework>
<ImplicitUsings>enable</ImplicitUsings>
<Nullable>enable</Nullable>
</PropertyGroup>
<ItemGroup>
<!-- 手动引入共享框架(不指定版本,自动跟随项目版本),多目标项目,也可以使用变量根据目标选择引入-->
<FrameworkReference Include="Microsoft.AspNetCore.App" />
</ItemGroup>
<ItemGroup>
<!--Nuget包引用-->
<PackageReference Include="Microsoft.AspNetCore.OpenApi" Version="7.0.5" />
<PackageReference Include="Swashbuckle.AspNetCore" Version="6.4.0" />
</ItemGroup>
<ItemGroup>
<!--项目引用-->
<ProjectReference Include="..\xx.csproj" />
</ItemGroup>
</Project>
```
```xml
<!-- 多目标示例-->
<Project Sdk="Microsoft.NET.Sdk">
<PropertyGroup>
<TargetFrameworks>netstandard2.0;netcoreapp3.0;netcoreapp3.1;net5.0;net6.0;net7.0</TargetFrameworks>
<PackageTags>aspnetcore;authentication;security;basicauth</PackageTags>
<Configurations>Debug;Release;CodeQL</Configurations>
</PropertyGroup>
<!-- netstandard2.0 版本引入老版本的包(Microsoft.AspNetCore.Authentication等) -->
<ItemGroup Condition="'$(TargetFramework)' == 'netstandard2.0'">
<PackageReference Include="Microsoft.AspNetCore.Authentication" Version="2.0" />
<PackageReference Include="Microsoft.AspNetCore.Http.Abstractions" Version="2.0" />
<PackageReference Include="Microsoft.Extensions.Options.ConfigurationExtensions" Version="2.0" />
</ItemGroup>
<!-- 高版本手动引入共享框架Microsoft.AspNetCore.App由共享框架引入模块 -->
<ItemGroup Condition="'$(TargetFramework)' != 'netstandard2.0'">
<FrameworkReference Include="Microsoft.AspNetCore.App" />
</ItemGroup>
</Project>
```