WPF application throws an 'XmlParseException was unhandled' when using Converter

I am building a small Wpf aplication to learn myself wpf. And i have encountered a problem with one of the controlers. i Have an object with a list of url's in a string format, and i want to bind them to an image and use the wpf converter class to convert the url's to bitmaps.

But when i implement the converter the program throws the following error:

'XmlParseException was unhandled'

And in the details it says this:

"{"Unable to cast object of type 'ChanGrabber.Converter' to type 'System.Windows.Data.IValueConverter'."}"

This is the code for referencing the converter in the xaml:

xmlns:local="clr-namespace:ChanGrabber">
<Window.Resources>
    <local:Converter x:Key="Convert"/>
</Window.Resources>

This is the code where i use the control:

<DataTemplate>
  <StackPanel Orientation="Horizontal">
    <Image Source="{Binding ThumbImgUrl, Converter={StaticResource Convert}}" />
  </StackPanel>
</DataTemplate>

and here is the code for the converter:

namespace ChanGrabber
{
    class Converter
    {
        [valueconversion(typeof(string), typeof(bitmapimage))]
        public class imageconverter : ivalueconverter
        {
            public object convert(object value, type targettype, object parameter, system.globalization.cultureinfo culture)
            {
                try
                {
                    string mypath = (string)value;
                    uri myuri = new uri(mypath);
                    bitmapimage animage = new bitmapimage(myuri);
                    return animage;
                }
                catch (exception)
                {

                    return new bitmapimage(new uri("ikke funket"));
                }
            }

            public object convertback(object value, type targettype, object parameter, system.globalization.cultureinfo culture)
            {
                throw new notimplementedexception开发者_StackOverflow();
            }
        }

And this is is the object i am binding to the image

class MainPosts : MainLinks
    {
        public MainPosts(string _title, string _link, String _postText, string _imageUrl, string _thumbUrl) :base(_title,_link)
        {
            PostText = _postText;
            ImageUrl = _imageUrl;
            ThumbImgUrl = _thumbUrl;
        }

        public String PostText { get; set; }

        public String ImageUrl { get; set; }

        public string ThumbImgUrl { get; set; }
    }

I have no idea why it won't work, and i am getting abit frustrated on the program. Any help will be so incredibly appreciated

use <local:imageconverter x:Key="Convert"/>

Your converter needs to implement the IValueConverter interface, otherwise WPF won't know what to do with it (so it gives you that exception.)

class Converter : IValueConverter
{
   ...
}