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Can you please add the assembly name and check. Open the assembly in object explorer &nbsp;and check whether the class you are looking for is available. 
 
&lt;UserControl &nbsp;..... 
&nbsp; &nbsp;xmlns:local=&quot;clr-namespace:MyProject.ViewModel, &lt;assembly name&gt;&quot;
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Can you please add the assembly name and check. Open the assembly in object explorer  and check whether the class you are looking for is available.

<UserControl  .....
   xmlns:local="clr-namespace:MyProject.ViewModel, <assembly name>"

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<div class="content wysiwyg-content">
How to add DataContext to User Control's XAML? 
 
I have a user control MyControl, it needs to be bound to its view model: MyControlViewModel. I have no problem to add the DataContext programmically in the constructor. But I was told this &nbsp;is not allowed. It has to be done in the XAML. However, I have gotten the error in XAML 
 
MyControlViewModel is in the project MyProject.ViewModel 
 
&lt;UserControl &nbsp;..... 
&nbsp; &nbsp;xmlns:local=&quot;clr-namespace:MyProject.ViewModel&quot; &nbsp; &nbsp; 
&nbsp; &nbsp;...... 
&nbsp; &nbsp;&gt; 
&nbsp; &nbsp; &lt;UserControl.DataContext&gt; 
&nbsp; &nbsp; &nbsp; &nbsp; &lt;local:MyControlViewModel/&gt; &nbsp; &nbsp; &nbsp; &nbsp;// ERROR: The name MyControlViewModel does not exist in the namespace &quot;clr-namespace:MyProject.ViewModel&quot; &nbsp; 
 
&nbsp; &nbsp; &lt;/UserControl.DataContext&gt; 
 
&nbsp; &nbsp;&lt;UserControl.Resources&gt; 
&nbsp; &nbsp; &nbsp; 
&nbsp; &nbsp; &nbsp; // Style stuff... 
 
&nbsp; &nbsp;&lt;/UserControl.Resources&gt; 
&lt;/UserControl&gt; 
 
 
Anyone can help me? 
 
Thanks a lot.
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How to add DataContext to User Control's XAML?

I have a user control MyControl, it needs to be bound to its view model: MyControlViewModel. I have no problem to add the DataContext programmically in the constructor. But I was told this is not allowed. It has to be done in the XAML. However, I have gotten the error in XAML

MyControlViewModel is in the project MyProject.ViewModel

<UserControl .....
 xmlns:local="clr-namespace:MyProject.ViewModel" 
 ......
 >
 <UserControl.DataContext>
 <local:MyControlViewModel/> // ERROR: The name MyControlViewModel does not exist in the namespace "clr-namespace:MyProject.ViewModel" 

 </UserControl.DataContext>

 <UserControl.Resources>
 
 // Style stuff...

 </UserControl.Resources>
</UserControl>


Anyone can help me?

Thanks a lot.

How to add DataContext to User Control's XAML?

C# is an object-oriented programming language created in conjunction with Microsoft’s .NET framework. Compilation is usually done into the Microsoft Intermediate Language (MSIL), which is then JIT-compiled to native code (and cached) during execution in the Common Language Runtime (CLR).

The .NET Framework is not specific to any one programming language; rather, it includes a library of functions that allows developers to rapidly build applications. Several supported languages include C#, VB.NET, C++ or ASP.NET.