Cannot create an instance of "RadRichTextBox"

2 posts, 0 answers
  1. Prasad
    Prasad avatar
    2 posts
    Member since:
    Apr 2012

    Posted 16 Apr 2012 Link to this post

    Hi ,

    I am new to Telerik RadRichTextBox control. I want to use this control in a silverlight application.

    I started using this as per the instructions in

    while building the application i am getting the following error
    1) Cannot create an instance of "RadRichTextBox"
    2) The tag 'RadRichTextBox' does not exist in XML namespace ''.

    My xaml looks like
    <UserControl x:Class="SilverlightApplication3.MainPage"
        d:DesignHeight="300" d:DesignWidth="400"

        <Grid x:Name="LayoutRoot"
            <telerik:RadRichTextBox Width="300" Height="400" IsReadOnly="False">


    Please respond ASAP
  2. Iva Toteva
    Iva Toteva avatar
    1319 posts

    Posted 17 Apr 2012 Link to this post

    Hi Prasad,

    Please, make sure that you have added all required references as listed here. Note that there are different versions of RadControls for Silverlight  - built for Silverlight 4 or Silverlight 5 respectively. The version of controls you are using must match the Target Framework of your project.
    If you are not able to resolve the problem, we would appreciate it if you could open a support ticket and attach a sample project as a zip file there.

    Iva Toteva
    the Telerik team

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