Problem with Inheritance

Question

Hello,

 

I have been having an issue with my application.

I have a Class that derives from UserControl as an abstract, lets call it Control A . then I am trying to make another control inherit from Control A so that I can use the functionality of Control A plus whatever i add to the new control (Control B )

 

Here is the code for Control A:

//usings

namespace MyNamespace
{
   public abstract class ControlA: UserControl
   {

   //Stuff Goes here

   }
}

That compiles fine. The code for control B is:

//usings

namespace MyNamespace
{
   /// <summary>
   /// Interaction logic for ControlB.xaml
   /// </summary>

   public partial class ControlB: ControlA 
   { 
       public ControlB() 
      { 
        InitializeComponent();
      }

      //Stuff Goes Here
   }
}

 

The xaml for control B looks like:

<src:ControlA
   x:Class="MyNamespace.ControlB"
   xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
   xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
   xmlns:src="clr-namespace:MyNamespace" 
   Height="50" Width="100">
  
  <Grid>
 
  </Grid>

</src:ControlA>

 

I thought that should work fine. but I am getting the following errors:

 

Error    1    Partial declarations of 'MyNamespace.ControlB' must not specify different base classes    MyApplication\MyNamespace\ControlB.xaml.cs    20    26    MyApplication

Error    2    Assembly 'MyNamespace' was not found. Verify that you are not missing an assembly reference. Also, verify that your project and all referenced assemblies have been built.    MyApplication\MyNamespace\ControlB.xaml    5    15    MyApplication

Error    3    The type 'src:ControlA' was not found. Verify that you are not missing an assembly reference and that all referenced assemblies have been built.    MyApplication\MyNamespace\ControlB.xaml   1    2    MyApplication

 

What am i doing wrong?