c# – 在重写FileConfigurationProvider时,将System.IO.Stream用

它看起来像这样..

public class MyProvider : FileConfigurationProvider
{
    public MyProvider(FileConfigurationSource source) : base(source) { }

    public override void Load(Stream stream)
    {
        try
        {
          // Stream reading things
        }
        catch
        {
            throw new Exception("Failed to load stream.");
        }
    }
}

尽管这个例子很简单,但是Load(Stream stream)的覆盖在VS2017中给出了一个指示,即没有合适的覆盖方法.此外,另一个错误提示表明未实现FileConfigurationProvider(System.IO.Stream).

使用ReSharper提取给委托已经显示了对Load(Stream stream)调用的新提示,声明Argument类型System.IO.Stream [System.IO,Version = 4.1.0.0 …]不能分配给类型的参数System.IO.Stream [System.Private.CoreLib,Version = 4.0.0.0 …]

尽管有这些错误提示,我仍然可以成功构建并运行此代码.

有人可以帮我理解这里有什么问题吗？

csproj如下..

<Project Sdk="Microsoft.NET.Sdk.Web">

  <PropertyGroup>
    <TargetFramework>netcoreapp1.1</TargetFramework>
  </PropertyGroup>

  <ItemGroup>
    <Folder Include="wwwroot" />
  </ItemGroup>
  <ItemGroup>
    <PackageReference Include="Microsoft.ApplicationInsights.AspNetCore" Version="2.0.0" />
    <PackageReference Include="Microsoft.AspNetCore" Version="1.1.2" />
    <PackageReference Include="Microsoft.AspNetCore.Mvc" Version="1.1.3" />
    <PackageReference Include="Microsoft.Extensions.Configuration" Version="1.1.2" />
    <PackageReference Include="Microsoft.Extensions.Configuration.Json" Version="1.1.2" />
    <PackageReference Include="Microsoft.Extensions.Logging.Debug" Version="1.1.2" />
  </ItemGroup>
  <ItemGroup>
    <DotNetCliToolReference Include="Microsoft.VisualStudio.Web.CodeGeneration.Tools" Version="1.0.1" />
  </ItemGroup>

</Project>

我也尝试过更明确的框架defs …

<PropertyGroup>
    <TargetFramework>netcoreapp1.1</TargetFramework>
    <NetStandardImplicitPackageVersion>1.6.1</NetStandardImplicitPackageVersion>
    <RuntimeFrameworkVersion>1.1.2</RuntimeFrameworkVersion>
  </PropertyGroup>