blocks|key|1036738|text|行为的官方包是。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1036739|它曾经位于Blend+SDK中(已弃用)。|offset|length|1036740|如果您需要迁移，请参阅Jan's+answer了解更多详细信息。|1036741|entityMap|0|LINK|mutability|MUTABLE|url|http://www.microsoft.com/download/en/details.aspx?id=10801|1|https://stackoverflow.com/a/56240223/546730^0|0|5|9|0|0|B|C|1|0^^$0|@$1|2|3|4|5|6|7|R|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|S|8|@]|9|@$D|T|E|U|1|V]]|A|$]]|$1|F|3|G|5|6|7|W|8|@]|9|@$D|X|E|Y|1|Z]]|A|$]]|$1|H|3|-4|5|6|7|10|8|@]|9|@]|A|$]]]|I|$J|$5|K|L|M|A|$N|O]]|P|$5|K|L|M|A|$N|Q]]]]

The official package for behaviors is <a href="https://www.nuget.org/packages/Microsoft.Xaml.Behaviors.Wpf/" rel="noreferrer"><code>Microsoft.Xaml.Behaviors.Wpf</code></a>.
It used to be in the <a href="http://www.microsoft.com/download/en/details.aspx?id=10801" rel="noreferrer">Blend SDK</a> (deprecated). 
See <a href="https://stackoverflow.com/a/56240223/546730">Jan's answer</a> for more details if you need to migrate.

blocks|key|5229906|text|尽管这个问题已经很久了，但我认为这是相关的新闻/最新的答案:微软开源了XAML+Behaviours，并发布了一篇博客文章如何更新到这个版本：https://devblogs.microsoft.com/dotnet/open-sourcing-xaml-behaviors-for-wpf/|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|5229907|为了节省您的点击，以下是迁移的主要步骤：|5229908|删除对“Microsoft.Expression.Interactions”和“System.Windows.Interactivity”的引用，并安装|5229909|+Microsoft.Xaml.Behaviors.Wpf+NuGet软件包。|unordered-list-item|5229910|
|5229911|XAML文件-将http://schemas.microsoft.com/expression/2010/interactivity和http://schemas.microsoft.com/expression/2010/interactions命名空间替换为http://schemas.microsoft.com/xaml/behaviors|5229912|5229913|C#文件-将c#文件中的用法“Microsoft.Xaml.Interactivity”和“Microsoft.Xaml.Interactions”替换为xmlns|5229914|5229915|entityMap|0|LINK|mutability|MUTABLE|url|https://devblogs.microsoft.com/dotnet/open-sourcing-xaml-behaviors-for-wpf/|1|https://www.nuget.org/packages/Microsoft.Xaml.Behaviors.Wpf/|2|http://schemas.microsoft.com/expression/2010/interactivity|3|http://schemas.microsoft.com/expression/2010/interactions|4|http://schemas.microsoft.com/xaml/behaviors^0|1Z|23|0|0|0|0|1|S|1|0|0|8|1M|2|1V|1L|3|3N|17|4|0|0|0|0^^$0|@$1|2|3|4|5|6|7|18|8|@]|9|@$A|19|B|1A|1|1B]]|C|$]]|$1|D|3|E|5|6|7|1C|8|@]|9|@]|C|$]]|$1|F|3|G|5|6|7|1D|8|@]|9|@]|C|$]]|$1|H|3|I|5|J|7|1E|8|@]|9|@$A|1F|B|1G|1|1H]]|C|$]]|$1|K|3|L|5|6|7|1I|8|@]|9|@]|C|$]]|$1|M|3|N|5|J|7|1J|8|@]|9|@$A|1K|B|1L|1|1M]|$A|1N|B|1O|1|1P]|$A|1Q|B|1R|1|1S]]|C|$]]|$1|O|3|L|5|6|7|1T|8|@]|9|@]|C|$]]|$1|P|3|Q|5|J|7|1U|8|@]|9|@]|C|$]]|$1|R|3|-4|5|6|7|1V|8|@]|9|@]|C|$]]|$1|S|3|-4|5|6|7|1W|8|@]|9|@]|C|$]]]|T|$U|$5|V|W|X|C|$Y|Z]]|10|$5|V|W|X|C|$Y|11]]|12|$5|V|W|X|C|$Y|13]]|14|$5|V|W|X|C|$Y|15]]|16|$5|V|W|X|C|$Y|17]]]]

Although this issue is quite old, i think this is relevant news / the most recent answer: Microsoft open-sourced XAML Behaviours and posted a blog post how to update to this version: <a href="https://devblogs.microsoft.com/dotnet/open-sourcing-xaml-behaviors-for-wpf/" rel="noreferrer">https://devblogs.microsoft.com/dotnet/open-sourcing-xaml-behaviors-for-wpf/</a>

To save you a click, this is the main steps to migrate:

<ol>
<li>Remove reference to “Microsoft.Expression.Interactions” and “System.Windows.Interactivity” </li>
<li>Install the <a href="https://www.nuget.org/packages/Microsoft.Xaml.Behaviors.Wpf/" rel="noreferrer">Microsoft.Xaml.Behaviors.Wpf</a> NuGet package. </li>
<li>XAML files – replace the xmlns namespaces <a href="http://schemas.microsoft.com/expression/2010/interactivity" rel="noreferrer">http://schemas.microsoft.com/expression/2010/interactivity</a> and <a href="http://schemas.microsoft.com/expression/2010/interactions" rel="noreferrer">http://schemas.microsoft.com/expression/2010/interactions</a> with <a href="http://schemas.microsoft.com/xaml/behaviors" rel="noreferrer">http://schemas.microsoft.com/xaml/behaviors</a></li>
<li>C# files – replace the usings in c# files “Microsoft.Xaml.Interactivity” and “Microsoft.Xaml.Interactions” with “Microsoft.Xaml.Behaviors”</li>
</ol>

blocks|key|3616160|text|有一个新的NuGet包，其中包含与以下各项兼容的System.Windows.Interactivity.dll：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3616161|3616162|WPF+4.0、4.5|unordered-list-item|3616163|Silverligt+4.0、5.0|3616164|Windows+Phone+7.1、8.0|3616165|Windows+Store+8、8.1|3616166|3616167|要安装Expression.Blend.Sdk，请在包管理器控制台中运行以下命令|3616168|PM>+Install-Package+Expression.Blend.Sdk|code-block|syntax|javascript|3616169|http://www.nuget.org/packages/Expression.Blend.Sdk/|offset|length|3616170|entityMap|0|LINK|mutability|MUTABLE|url^0|0|0|0|0|0|0|0|0|0|0|1F|0|0^^$0|@$1|2|3|4|5|6|7|14|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|15|8|@]|9|@]|A|$]]|$1|C|3|D|5|E|7|16|8|@]|9|@]|A|$]]|$1|F|3|G|5|E|7|17|8|@]|9|@]|A|$]]|$1|H|3|I|5|E|7|18|8|@]|9|@]|A|$]]|$1|J|3|K|5|E|7|19|8|@]|9|@]|A|$]]|$1|L|3|-4|5|6|7|1A|8|@]|9|@]|A|$]]|$1|M|3|N|5|6|7|1B|8|@]|9|@]|A|$]]|$1|O|3|P|5|Q|7|1C|8|@]|9|@]|A|$R|S]]|$1|T|3|U|5|6|7|1D|8|@]|9|@$V|1E|W|1F|1|1G]]|A|$]]|$1|X|3|-4|5|6|7|1H|8|@]|9|@]|A|$]]]|Y|$Z|$5|10|11|12|A|$13|U]]]]

There is a new NuGet package that contains the System.Windows.Interactivity.dll that is compatible with:

<ul>
<li>WPF 4.0, 4.5</li>
<li>Silverligt 4.0, 5.0</li>
<li>Windows Phone 7.1, 8.0</li>
<li>Windows Store 8, 8.1</li>
</ul>

To install Expression.Blend.Sdk, run the following command in the Package Manager Console

<pre class="lang-none prettyprint-override"><code>PM&gt; Install-Package Expression.Blend.Sdk
</code></pre>

<a href="http://www.nuget.org/packages/Expression.Blend.Sdk/" rel="noreferrer">http://www.nuget.org/packages/Expression.Blend.Sdk/</a>

blocks|key|5229628|text|最简单的方法可能是从NuGet获取它：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|5229629|http://www.nuget.org/packages/System.Windows.Interactivity.WPF/|offset|length|5229630|entityMap|0|LINK|mutability|MUTABLE|url^0|0|0|1R|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|N|8|@]|9|@$D|O|E|P|1|Q]]|A|$]]|$1|F|3|-4|5|6|7|R|8|@]|9|@]|A|$]]]|G|$H|$5|I|J|K|A|$L|C]]]]

The easiest way might be to get it from NuGet:

<a href="http://www.nuget.org/packages/System.Windows.Interactivity.WPF/">http://www.nuget.org/packages/System.Windows.Interactivity.WPF/</a>

blocks|key|5229830|text|使用Visual+Studio从2013版开始包含的Blend+for+Visual+Studio，您可以在以下文件夹中找到：|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|5229831|C:\Program+Files+(x86)\Microsoft+SDKs\Expression\Blend\.NETFramework\v4.5\Libraries|code-block|syntax|javascript|5229832|但是，您必须自己添加对System.Windows.Interactivity.dll的引用，除非您使用Blend+for+Visual+Studio与现有项目一起添加使用交互性命名空间的功能。在这种情况下，Blend将自动添加引用。|CODE|5229833|entityMap^0|Q|10|0|0|B|W|0^^$0|@$1|2|3|4|5|6|7|P|8|@$9|Q|A|R|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|S|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|T|8|@$9|U|A|V|B|M]]|D|@]|E|$]]|$1|N|3|-4|5|6|7|W|8|@]|D|@]|E|$]]]|O|$]]

With Blend for Visual Studio, which is included in Visual Studio starting with version 2013, you can find the DLL in the following folder:

<pre><code>C:\Program Files (x86)\Microsoft SDKs\Expression\Blend\.NETFramework\v4.5\Libraries
</code></pre>

You will have to add the reference to the <code>System.Windows.Interactivity.dll</code> yourself though, unless you use Blend for Visual Studio with an existing project to add functionality that makes use of the Interactivity namespace. In that case, Blend will add the reference automatically.

blocks|key|5229747|text|有时，当您添加新库时，中会引入冲突版本的System.Windows.Interactivity.dll。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|5229748|例如，NuGet包MVVM+light可能需要4.2版的System.Windows.Interactivity.dll，而NuGet包Rx-XAML可能需要4.5版的System.Windows.Interactivity.dll。这将阻止项目工作，因为无论您包含哪个版本的System.Windows.Interactivity.dll，其中一个库都会拒绝编译。|5229749|要修复此问题，请通过编辑app.config来添加程序集绑定重定向，如下所示：|5229750|<?xml+version="1.0"?>
<configuration>
++<runtime>
++++<assemblyBinding+xmlns="urn:schemas-microsoft-com:asm.v1">
++++++<dependentAssembly>
++++++++<assemblyIdentity+name="System.Windows.Interactivity"
++++++++++++++++++++++++++publicKeyToken="31bf3856ad364e35"
++++++++++++++++++++++++++culture="neutral"/>
++++++++<bindingRedirect+oldVersion="4.0.0.0"
+++++++++++++++++++++++++newVersion="4.5.0.0"+/>
++++++</dependentAssembly>
++++</assemblyBinding>
++</runtime>
++<startup><supportedRuntime+version="v4.0"+sku=".NETFramework,Version=v4.5"/></startup>
++<appSettings>
++++<add+key="TestKey"+value="true"/>
++</appSettings>
</configuration>|code-block|syntax|javascript|5229751|不要担心更改PublicKeyToken，这在所有版本中都是恒定的，因为它取决于.dll的名称，而不是版本。|5229752|确保appConfig中的newVersion与您最终指向的实际版本相匹配：|5229753|​|5229754|📷|atomic|5229755|5229756|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/dc237ce44f212e7597b99787c156f26a.png|imageAlt^0|K|W|0|9|A|S|W|1W|7|2C|W|3U|W|0|C|A|0|0|6|E|0|2|9|D|A|0|0|0|1|0|0|0^^$0|@$1|2|3|4|5|6|7|17|8|@$9|18|A|19|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|1A|8|@$9|1B|A|1C|B|C]|$9|1D|A|1E|B|C]|$9|1F|A|1G|B|C]|$9|1H|A|1I|B|C]|$9|1J|A|1K|B|C]]|D|@]|E|$]]|$1|H|3|I|5|6|7|1L|8|@$9|1M|A|1N|B|C]]|D|@]|E|$]]|$1|J|3|K|5|L|7|1O|8|@]|D|@]|E|$M|N]]|$1|O|3|P|5|6|7|1P|8|@$9|1Q|A|1R|B|C]]|D|@]|E|$]]|$1|Q|3|R|5|6|7|1S|8|@$9|1T|A|1U|B|C]|$9|1V|A|1W|B|C]]|D|@]|E|$]]|$1|S|3|T|5|6|7|1X|8|@]|D|@]|E|$]]|$1|U|3|V|5|W|7|1Y|8|@]|D|@$9|1Z|A|20|1|21]]|E|$]]|$1|X|3|T|5|6|7|22|8|@]|D|@]|E|$]]|$1|Y|3|-4|5|6|7|23|8|@]|D|@]|E|$]]]|Z|$10|$5|11|12|13|E|$14|15|16|-4]]]]

Sometimes, when you add a new library, in introduces a clashing version of <code>System.Windows.Interactivity.dll</code>.
For example, the NuGet package <code>MVVM light</code> might require v4.2 of <code>System.Windows.Interactivity.dll</code>, but the NuGet package <code>Rx-XAML</code> might require v4.5 of <code>System.Windows.Interactivity.dll</code>. This will prevent the the project from working, because no matter which version of <code>System.Windows.Interactivity.dll</code> you include, one of the libraries will refuse to compile.
To fix, add an Assembly Binding Redirect by editing your <code>app.config</code> to look something like this:
<pre class="lang-xml prettyprint-override"><code>&lt;?xml version=&quot;1.0&quot;?&gt;
&lt;configuration&gt;
 &lt;runtime&gt;
 &lt;assemblyBinding xmlns=&quot;urn:schemas-microsoft-com:asm.v1&quot;&gt;
 &lt;dependentAssembly&gt;
 &lt;assemblyIdentity name=&quot;System.Windows.Interactivity&quot;
 publicKeyToken=&quot;31bf3856ad364e35&quot;
 culture=&quot;neutral&quot;/&gt;
 &lt;bindingRedirect oldVersion=&quot;4.0.0.0&quot;
 newVersion=&quot;4.5.0.0&quot; /&gt;
 &lt;/dependentAssembly&gt;
 &lt;/assemblyBinding&gt;
 &lt;/runtime&gt;
 &lt;startup&gt;&lt;supportedRuntime version=&quot;v4.0&quot; sku=&quot;.NETFramework,Version=v4.5&quot;/&gt;&lt;/startup&gt;
 &lt;appSettings&gt;
 &lt;add key=&quot;TestKey&quot; value=&quot;true&quot;/&gt;
 &lt;/appSettings&gt;
&lt;/configuration&gt;
</code></pre>
Don't worry about changing the <code>PublicKeyToken</code>, that's constant across all versions, as it depends on the name of the .dll, not the version.
Ensure that you match the <code>newVersion</code> in your <code>appConfig</code> to the actual version that you end up pointing at:
<a href="https://i.stack.imgur.com/wLT9g.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/wLT9g.png" alt="enter image description here" /></a>

blocks|key|3616609|text|我在一个解决方案中遇到了完全相同的问题，即Visual+Studio2019中的一个项目需要System.Windows.Interactivity，我试图从Visual+Studio2019的单个组件中安装Blend+for+Visual+Studio+SDK+for+.NET，但它并不存在。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|3616610|的后果，我无法在我的解决方案中构建项目，在项目的不同XAML部分上重复以下类似的错误：|BOLD|3616611|XML命名空间'clr-namespace:System.Windows.Interactivity;assembly=System.Windows.Interactivity'.中不存在标记“”Interaction.Behaviors“”|3616612|3616613|​|3616614|📷|atomic|3616615|上面提到的错误快照示例|3616616|我解决解决方案的方法是安装微软的Microsoft+Expression+Blend+Software+Development+Kit+(SDK)+for+.NET+4。|3616617|感谢我的同事@felza，提到System.Windows.Interactivity需要这个sdk，它应该位于这个文件夹中：|3616618|C:\Program+Files+(x86)\Microsoft+SDKs\Expression\Blend\.NETFramework\v4.0|code-block|syntax|javascript|3616619|在我的情况下，它没有安装。我有一个不带Expression\Blend\.NETFramework\v4.0文件夹的C:\Program+Files+(x86)\Microsoft+SDKs文件夹。|3616620|安装后，所有的错误都会消失。|3616621|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/1f45987e5e0736140e94cef578e5dcea.jpeg|imageAlt|1|LINK|MUTABLE|url|https://www.microsoft.com/en-us/download/details.aspx?id=10801^0|1A|S|2W|10|0|0|3|0|0|0|0|0|1|0|0|0|G|1W|1|0|F|S|0|0|J|Z|1M|11|0|0^^$0|@$1|2|3|4|5|6|7|1J|8|@$9|1K|A|1L|B|C]|$9|1M|A|1N|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|1O|8|@$9|1P|A|1Q|B|H]]|D|@]|E|$]]|$1|I|3|J|5|6|7|1R|8|@]|D|@]|E|$]]|$1|K|3|-4|5|6|7|1S|8|@]|D|@]|E|$]]|$1|L|3|M|5|6|7|1T|8|@]|D|@]|E|$]]|$1|N|3|O|5|P|7|1U|8|@]|D|@$9|1V|A|1W|1|1X]]|E|$]]|$1|Q|3|R|5|6|7|1Y|8|@]|D|@]|E|$]]|$1|S|3|T|5|6|7|1Z|8|@]|D|@$9|20|A|21|1|22]]|E|$]]|$1|U|3|V|5|6|7|23|8|@$9|24|A|25|B|C]]|D|@]|E|$]]|$1|W|3|X|5|Y|7|26|8|@]|D|@]|E|$Z|10]]|$1|11|3|12|5|6|7|27|8|@$9|28|A|29|B|C]|$9|2A|A|2B|B|C]]|D|@]|E|$]]|$1|13|3|14|5|6|7|2C|8|@]|D|@]|E|$]]|$1|15|3|-4|5|6|7|2D|8|@]|D|@]|E|$]]]|16|$17|$5|18|19|1A|E|$1B|1C|1D|-4]]|1E|$5|1F|19|1G|E|$1H|1I]]]]

I have had the exact same problem with a solution, that <code>System.Windows.Interactivity</code> was required for one of the project in Visual Studio 2019, and I tried to install <code>Blend for Visual Studio SDK for .NET</code> from Visual Studio 2019 Individual components, but it did not exist in it.
The consequence of that, I was not able to build the project in my solution with repetitive of following similar error on different XAML parts of the project:
<blockquote>
The tag 'Interaction.Behaviors' does not exist in XML namespace
'clr-namespace:System.Windows.Interactivity;assembly=System.Windows.Interactivity'.
</blockquote>
<a href="https://i.stack.imgur.com/gqenw.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/gqenw.jpg" alt="Image with all errors" /></a>
The above mentioned errors snapshot example
The solution, the way I solved it, is by installing <a href="https://www.microsoft.com/en-us/download/details.aspx?id=10801" rel="nofollow noreferrer">Microsoft Expression Blend Software Development Kit (SDK) for .NET 4</a> from Microsoft.
Thanks to my colleague @felza, mentioned that <code>System.Windows.Interactivity</code> requires this sdk, that is suppose to be located in this folder:
<pre><code>C:\Program Files (x86)\Microsoft SDKs\Expression\Blend\.NETFramework\v4.0
</code></pre>
In my case it was not installed. I have had this folder <code>C:\Program Files (x86)\Microsoft SDKs</code> with out <code>Expression\Blend\.NETFramework\v4.0</code> folder inside it.
After installing it, all errors disappeared.

blocks|key|5229694|text|它在MVVM+Light中，从MVVM+Light+Download+Page获取它。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|5229695|entityMap|0|LINK|mutability|MUTABLE|url|https://mvvmlight.codeplex.com/^0|F|O|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

It's in MVVM Light, get it from the <a href="https://mvvmlight.codeplex.com/" rel="nofollow">MVVM Light Download Page</a>.

blocks|key|1039410|text|我是通过Prism.WPF+NuGet-Package获得的。(包括Windows.System.Interactivity)|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1039411|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

I got it via the Prism.WPF NuGet-Package. (it includes Windows.System.Interactivity)

blocks|key|5229959|text|如果您使用的是MVVM+Light，则必须使用位于以下位置的System.Windows.Interactivity+Version+4.0+(+NuGet+.dll无法工作)：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|5229960|PathToProjectFolder\Software\packages\MvvmLightLibs.5.4.1.1\lib\net45\System.Windows.Interactivity.dll|5229961|只需手动添加此.dll作为引用，就可以了。|5229962|entityMap^0|U|14|0|0|2U|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@$9|M|A|N|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|O|8|@$9|P|A|Q|B|C]]|D|@]|E|$]]|$1|H|3|I|5|6|7|R|8|@]|D|@]|E|$]]|$1|J|3|-4|5|6|7|S|8|@]|D|@]|E|$]]]|K|$]]

If you are working with MVVM Light you have to use the <code>System.Windows.Interactivity Version 4.0</code> (the NuGet .dll wont work) that you can find under : 

<code>PathToProjectFolder\Software\packages\MvvmLightLibs.5.4.1.1\lib\net45\System.Windows.Interactivity.dll</code>

Just add this .dll manually as Reference and it should be fine.

blocks|key|5230153|text|我在使用Visual+Studio+2019时遇到以下错误：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|5230154|System.Windows.Markup.XamlParseException:+|offset|length|style|BOLD|5230155|‘无法加载文件或程序集'System.Windows.Interactivity，Version=4.5.0.0，Culture=neutral，PublicKeyToken=31bf3856ad364e35’或其依赖项之一。找到的程序集的清单定义与程序集引用不匹配。(HRESULT异常:+0x80131040)‘|blockquote|5230156|5230157|5230158|我们的项目使用packages.config，并且有对MVVMLightLibs+5.4.1.1和System.Windows.Interactivity.WPF+2.0.20525的NuGet引用。|CODE|5230159|根据这里的一些其他答案，我意识到问题是MVVMLight使用的DLL版本与我们的项目使用的DLL版本之间的冲突。解决方案是：|5230160|update删除指向System.Windows.Interactivity.|5230161|Added对packages\MvvmLightLibs.5.4.1.1\lib\net45\System.Windows.Interactivity.dll.|unordered-list-item|5230162|
|5230163|Add的引用的NuGet引用(在我们的示例中为更新)绑定重定向到app.config:|5230164|5230165|<dependentAssembly>
++++<assemblyIdentity+name="System.Windows.Interactivity"+publicKeyToken="31bf3856ad364e35"+culture="neutral"+/>
++++<bindingRedirect+oldVersion="0.0.0.0-4.5.0.0"+newVersion="4.5.0.0"+/>
</dependentAssembly>|code-block|syntax|javascript|5230166|entityMap^0|0|0|15|0|0|0|0|R|L|1D|16|0|0|A|S|0|6|21|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|18|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|19|8|@$D|1A|E|1B|F|G]]|9|@]|A|$]]|$1|H|3|I|5|J|7|1C|8|@]|9|@]|A|$]]|$1|K|3|-4|5|6|7|1D|8|@]|9|@]|A|$]]|$1|L|3|-4|5|6|7|1E|8|@]|9|@]|A|$]]|$1|M|3|N|5|6|7|1F|8|@$D|1G|E|1H|F|O]|$D|1I|E|1J|F|O]]|9|@]|A|$]]|$1|P|3|Q|5|6|7|1K|8|@]|9|@]|A|$]]|$1|R|3|S|5|6|7|1L|8|@$D|1M|E|1N|F|O]]|9|@]|A|$]]|$1|T|3|U|5|V|7|1O|8|@$D|1P|E|1Q|F|O]]|9|@]|A|$]]|$1|W|3|X|5|6|7|1R|8|@]|9|@]|A|$]]|$1|Y|3|Z|5|V|7|1S|8|@]|9|@]|A|$]]|$1|10|3|-4|5|6|7|1T|8|@]|9|@]|A|$]]|$1|11|3|12|5|13|7|1U|8|@]|9|@]|A|$14|15]]|$1|16|3|-4|5|6|7|1V|8|@]|9|@]|A|$]]]|17|$]]

I was getting the following error using Visual Studio 2019:
<blockquote>
System.Windows.Markup.XamlParseException: 'Could not load file or assembly 'System.Windows.Interactivity, Version=4.5.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040)'
</blockquote>
Our project is using packages.config and had NuGet references to <code>MVVMLightLibs 5.4.1.1</code> and <code>System.Windows.Interactivity.WPF 2.0.20525</code>.
Guided by some of the other answers here, I realised the problem was a conflict between the version of the DLL that MVVMLight was using and the one our project was using. The solution was:
<ul>
<li>Remove the NuGet reference to <code>System.Windows.Interactivity</code>.</li>
<li>Added a Reference to <code>packages\MvvmLightLibs.5.4.1.1\lib\net45\System.Windows.Interactivity.dll</code>.</li>
<li>Add (in our case, update) a Binding Redirect to app.config:</li>
</ul>
<pre><code>&lt;dependentAssembly&gt;
 &lt;assemblyIdentity name=&quot;System.Windows.Interactivity&quot; publicKeyToken=&quot;31bf3856ad364e35&quot; culture=&quot;neutral&quot; /&gt;
 &lt;bindingRedirect oldVersion=&quot;0.0.0.0-4.5.0.0&quot; newVersion=&quot;4.5.0.0&quot; /&gt;
&lt;/dependentAssembly&gt;
</code></pre>

My project missing <code>System.Windows.Interactivity</code>. Google says that I have to install Expression Blend, but on my other computer I have this library and I don't have Expression Blend installed. So there should be another way to obtain <code>System.Windows.Interactivity</code>? What should I do? (right now i don't have another computer so I can not just copy this library :)

How to add System.Windows.Interactivity to project?

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我的项目缺少System.Windows.Interactivity。Google说我必须安装Expression Blend，但在我的另一台计算机上，我有这个库，但我没有安装Expression Blend。那么应该有另一种方法来获得System.Windows.Interactivity？我该怎么办？(现在我没有另一台计算机，所以我不能只复制这个库:)

问如何将System.Windows.Interactivity添加到项目中？
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