Cannot use a user control containing numerivupdown in another project

[pcinfogmach]

System.Windows.Markup.XamlParseException
HResult=0x80131501
Message='Set property 'System.Windows.ResourceDictionary.DeferrableContent' threw an exception.' Line number '7' and line position '22'.
Source=PresentationFramework
StackTrace:
at System.Windows.Markup.WpfXamlLoader.Load(XamlReader xamlReader, IXamlObjectWriterFactory writerFactory, Boolean skipJournaledProperties, Object rootObject, XamlObjectWriterSettings settings, Uri baseUri)
at System.Windows.Markup.WpfXamlLoader.LoadBaml(XamlReader xamlReader, Boolean skipJournaledProperties, Object rootObject, XamlAccessLevel accessLevel, Uri baseUri)
at System.Windows.Markup.XamlReader.LoadBaml(Stream stream, ParserContext parserContext, Object parent, Boolean closeStream)
at System.Windows.Application.LoadComponent(Object component, Uri resourceLocator)
at FullText.FullTxtView.InitializeComponent() in C:\Users\Admin\source\repos\FullText\FullText\FullTxtView.xaml:line 1

This exception was originally thrown at this call stack:
[External Code]

Inner Exception 1:
FileNotFoundException: Could not load file or assembly 'NumericUpDownLib, PublicKeyToken=null' or one of its dependencies. The system cannot find the file specified.