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Editorial Team
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Asked: 2026-05-22T22:05:18+00:00

I am working through an MVVM tutorial, and I have the following code, written

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I am working through an MVVM tutorial, and I have the following code, written in Xaml:

<Window x:Class="WPFMVVM.MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:local="clr-namespace:WPFMVVM; assembly=WPFMVVM"
    Title="MainWindow" Height="388" Width="545">

The xmlns:local line is complaining saying that WPFMVVM assembly is not referenced. Although it is the assembly that I am working in.

Anybody know why?

Thanks

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1 Answer

  1. Editorial Team

    You must not have spaces in there & if it’s the assembly you work in just do not specify assembly.

    xmlns:local="clr-namespace:WPFMVVM"

    The assembly parameter is for referenced assemblies. Also see the MSDN article on XAML namespaces.

    assembly can be omitted if the clr-namespace referenced is being defined within the same assembly as the application code that is referencing the custom classes. Or, an equivalent syntax for this case is to specify assembly=, with no string token following the equals sign.

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