C# Xamarin Android：自相矛盾的依赖需求？

在Xamarin Studio中尝试构建我的Android项目时，我不断遇到以下错误：

C:\Program Files (x86)\MSBuild\Xamarin\Android\Xamarin.Android.Common.targets(2,2): 
Error: Exception while loading assemblies: System.IO.FileNotFoundException: 
Could not load assembly 'Mono.Android.Support.v4, Version=0.0.0.0, Culture=neutral, PublicKeyToken=84e04ff9cfb79065'. 
Perhaps it doesn't exist in the Mono for Android profile?
File name: 'Mono.Android.Support.v4.dll'
   at Xamarin.Android.Tuner.DirectoryAssemblyResolver.Resolve(AssemblyNameReference reference, ReaderParameters parameters)
   at Xamarin.Android.Tasks.ResolveAssemblies.AddAssemblyReferences(ICollection`1 assemblies, AssemblyDefinition assembly, Boolean topLevel)
   at Xamarin.Android.Tasks.ResolveAssemblies.Execute() (Akva20150407)

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• 我必须将Xamarin.Android.Support.v4添加到MonoAndroid文件夹，否则它会抱怨找不到它
• 我必须将Mono.Android.Support.v4添加到MonoAndroid文件夹，否则它会抱怨找不到它
• 如果我同时添加这两个包，它会抱怨在这两个包中都可以找到FragmentActivity
• 这些软件包是通过NuGet安装的

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这看起来很自相矛盾。。。。我到底该怎么做才能让它正常工作呢？？？

升级你的Xamarin工作室

此错误已在Xamarin Studio中修复：5.7.0.436。

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请参阅错误报告：

您是否通过组件商店或nuget package manager安装了它们？我有类似的问题，通过nuget帮助重新安装软件包。我已经通过nuget安装了所有软件包。我刚刚尝试删除并重新安装Xamarin.Android.Support.v4，现在我遇到了新的错误：错误：找到了重复的托管类型！托管类型和Java类型之间的映射必须是唯一的。第一种类型：“Xamarin.Android.Support.v4”；第二种类型：“Mono.Android.Support.v4”（Akva20150407）

C:\Program Files (x86)\MSBuild\Xamarin\Android\Xamarin.Android.Common.targets(2,2): 
Error: Exception while loading assemblies: System.IO.FileNotFoundException: 
Could not load assembly 'Xamarin.Android.Support.v4, Version=1.0.0.0, Culture=neutral, PublicKeyToken='. 
Perhaps it doesn't exist in the Mono for Android profile?
File name: 'Xamarin.Android.Support.v4.dll'
   at Xamarin.Android.Tuner.DirectoryAssemblyResolver.Resolve(AssemblyNameReference reference, ReaderParameters parameters)
   at Xamarin.Android.Tasks.ResolveAssemblies.AddAssemblyReferences(ICollection`1 assemblies, AssemblyDefinition assembly, Boolean topLevel)
   at Xamarin.Android.Tasks.ResolveAssemblies.Execute() (Akva20150407)

C:\progge\Apper\Akva20150407\Akva20150407\Act_MainGUI.cs(29,29): 
Error CS0433: The type 'Android.Support.V4.App.FragmentActivity' exists in both 
'c:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\MonoAndroid\v5.0\Mono.Android.Support.v4.dll' and 
'c:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\MonoAndroid\v5.0\Xamarin.Android.Support.v4.dll' 
(CS0433) (Akva20150407)