Tool Type: BusyIndicator not found

Question

I am working on a WPF project with the start of UserControl, which is defined as:

<UserControl x:Class="" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:converters="clr-namespace:.Modules.Converters" xmlns:toolkit="http://schemas.microsoft.com/winfx/2006/xaml/presentation/toolkit/extended" mc:Ignorable="d"> 

Inside a user control, this is:

 <toolkit:BusyIndicator IsBusy="{Binding IsBusy}" BusyContent="Please wait..."> 

I have WPFToolkit.Extended, which is referenced in my project, and this link appears to be valid (does not have a red underline).

However, I get this error and don’t know why:

Type "toolkit: BusyIndicator" not found. Make sure that you did not provide a reference to the assembly and that all reference assemblies have been created.

Any ideas?

Answer 1

Browse to the folder that binds the DLL. Right-click on the DLL and select properties. On the general tab at the bottom, click the "Unblock" button. You should be good to go.