Xamarin Native项目UWP编译报错：找不到SDK 'BehaviorsXamlSDKManaged, Version=12.0'求助

Hey there, let's work through this frustrating UWP compilation error together! This issue usually stems from missing SDK components or outdated project references, and since it's happening across machines, it's likely a configuration or dependency problem rather than a local machine glitch. Here are the actionable steps to resolve it:

1. Verify Visual Studio SDK Installation #

First, make sure the required SDK is actually installed on your machine:

• Open the Visual Studio Installer, select your installed VS version, and click Modify.
• Under the Workloads tab, ensure Universal Windows Platform development is checked.
• Expand this workload, scroll down to Optional components, and confirm XAML Behaviors SDK (Version 12.0) is selected. If not, check it and click Modify to install the missing component.

2. Replace Outdated SDK Reference with NuGet Package #

The BehaviorsXamlSDKManaged SDK is somewhat legacy, and Microsoft now recommends using the official NuGet package instead. Here's how to switch:

• Right-click your UWP project in Solution Explorer → Unload Project.
• Right-click the unloaded project → Edit [YourProjectName].csproj.
• Search for any <Reference> nodes pointing to BehaviorsXamlSDKManaged and delete them (they’ll look something like this):

  <Reference Include="BehaviorsXamlSDKManaged, Version=12.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35">
    <HintPath>...</HintPath>
  </Reference>
  

• Save the .csproj file, reload the project, then right-click it → Manage NuGet Packages.
• Search for and install the Microsoft.Xaml.Behaviors.Uwp.Managed package. This will add the up-to-date, maintained version of the behaviors library to your project.

3. Clean and Rebuild the Entire Solution #

Corrupted build artifacts can sometimes cause false missing dependency errors:

• Right-click your solution → Clean Solution.
• Manually delete the bin and obj folders from your UWP project directory (this ensures all old build files are gone).
• Right-click the solution again → Rebuild Solution.

4. Reset SDK Cache (If Needed) #

If you’ve confirmed the SDK is installed but the error persists, try clearing the SDK cache:

• Navigate to C:\Program Files (x86)\Microsoft SDKs\Windows\v10.0\ExtensionSDKs and delete the BehaviorsXamlSDKManaged folder (if it exists).
• Go back to Visual Studio Installer, modify your VS installation, uncheck the XAML Behaviors SDK, click Modify to uninstall it, then re-check and install it again. This forces a fresh SDK download.

These steps should resolve the missing SDK error and get your UWP project compiling again!

内容的提问来源于stack exchange，提问作者Surendar