我在Visual Studio代码中的项目中生成此异常：
发生异常：CLR / System.IO.FileLoadException在Infrastructure.dll中发生类型'System.IO.FileLoadException'的异常，但未在用户代码中处理：'无法加载文件或程序集'System，Version = 4.0 . 0.0，Culture = neutral，PublicKeyToken = b77a5c561934e089' . 定位的程序集的清单定义与程序集引用不匹配 . （来自HRESULT的异常：0x80131040）'位于d：\ C＃\ FrequentFlyer \ FrequentFlyer.Infrastructure \ Services \ GoogleMapsService中的FrequentFlyer.Infrastructure.Services.GoogleMapsService.GetLatLongAsync（AddressData city）中的GoogleMaps.LocationServices.GoogleLocationService.GetLatLongFromAddress（字符串地址） . cs：第20行在FrequentFlyer.Infrastructure.Services.NodeProvider..ctor（IMemoryCache缓存，IGoogleMapsService googleMapsService）的d：\ C＃\ FrequentFlyer \ FrequentFlyer.Infrastructure \ Services \ NodeProvider.cs：第83行，位于Autofac.Core.Activators.Reflection .ConstructorParameterBinding.Instantiate（）
此异常显示在第三行：
public double[] GetLatLongAsync(AddressData city)
{
var latlong = _googleLocationService.GetLatLongFromAddress(city);
var latitude = latlong.Latitude;
var longitide = latlong.Longitude;
double[] coordinates = {latitude, longitide};
return coordinates;
}
我认为问题出在我的.csproj文件中 . 我之前遇到了几乎相同的问题（System，Version = 4.0.0.0，Culture = neutral，PublicKeyToken = b77a5c561934e089'），但是当我安装了包时：“Microsoft.NETCore.Portable.Compatibility”Version =“1.0.1” ，问题消失了 . 现在再次显示，我无法处理它 .
我使用.NET Standard1.6，但是包：GoogleMaps.LocationServices只与.NET Framework 4.0兼容，所以我的.csproj很丑陋（在我看来） .
这是我的.csproj文件：
<Project Sdk="Microsoft.NET.Sdk">
<PropertyGroup>
<TargetFrameworks>netstandard1.6</TargetFrameworks>
<PackageTargetFallback Condition=" '$(TargetFramework)' == 'netstandard1.6' ">$(PackageTargetFallback);net40</PackageTargetFallback>
<AssemblyName>Infrastructure</AssemblyName>
<PackageId>Infrastructure</PackageId>
<NetStandardImplicitPackageVersion>1.6.1</NetStandardImplicitPackageVersion>
</PropertyGroup>
<ItemGroup>
<ProjectReference Include="../FrequentFlyer.Core/FrequentFlyer.Core.csproj" />
</ItemGroup>
<ItemGroup>
<PackageReference Include="Autofac" Version="4.5.0" />
<PackageReference Include="AutoMapper" Version="6.0.2" />
<PackageReference Include="GoogleMaps.LocationServices" Version="1.2.0.1" />
<PackageReference Include="Microsoft.AspNetCore.Authentication.JwtBearer" Version="1.1.1" />
<PackageReference Include="Microsoft.Extensions.Caching.Memory" Version="1.1.1" />
<PackageReference Include="Microsoft.Extensions.Configuration" Version="1.1.1" />
<PackageReference Include="Microsoft.Extensions.Configuration.Binder" Version="1.1.1" />
<PackageReference Include="Microsoft.EntityFrameworkCore.SqlServer" Version="1.1.2" />
<PackageReference Include="Microsoft.EntityFrameworkCore.InMemory" Version="1.1.2" />
<PackageReference Include="Microsoft.NETCore.Portable.Compatibility" Version="1.0.1" />
<PackageReference Include="MongoDb.Driver" Version="2.4.4" />
<PackageReference Include="Newtonsoft.Json" Version="10.0.01" />
<PackageReference Include="NLog.Extensions.Logging " Version="1.0.0-rtm-beta5 " />
<PackageReference Include="NLog.Web.AspNetCore" Version="4.4.0" />
<PackageReference Include="System.Device.Location.Portable" Version="1.0.0" />
</ItemGroup>
<ItemGroup>
<Folder Include="Mongo\" />
</ItemGroup>
</Project>
有什么问题，如何解决这个问题？