Error: Cannot create an instance of xyz

ShaningYu

In one of the xaml file, received such an error at the line of code:

            <userControls:GraphComparison x:Name="GraphComp"/>

Error 114 Cannot create an instance of "GraphComparison". C:\...\Views\CompareCycles.xaml 270 13

The detail shows that
Cannot find a Resource with the Name/Key CommonBorder [Line: 10 Position: 44]
   at System.Windows.Application.LoadComponent(Object component, Uri resourceLocator)
   at xyz.UserControls.GraphComparison.InitializeComponent() in C:\...\obj\Debug\UserControls\GraphComparison.g.i.cs:line 60
   at xyz.UserControls.GraphComparison..ctor() in C:\...\UserControls\GraphComparison.xaml.cs:line 20

However, I did declare:
xmlns:userControls="clr-namespace:npsNavSL.UserControls"
and found nothing wrong.  Wish can get someone's hint for this bug.  Thanks.

JenniferNery

Please check...

If it can't find it then maybe the   XAML namespace declaration could be wrong. Another way to check is to put a break point on GraphicSource class, to see if it comes through there. Check the class namespace is the same as what you define for xmlns:userControls="...".