SharePoint University

Hello

 I'm trying to customize the RichImageField with this code

namespace Test.SharePoint.WebControls
{
    public class MyCustomCalendar : RichImageField
    {
       protected override void RenderFieldForDisplay(HtmlTextWriter output)
        {
            // create a new tempWriter to consume the output from the base class
            TextWriter tempWriter = new StringWriter();
            base.RenderFieldForDisplay(new HtmlTextWriter(tempWriter));
 
            // capture the output of the base class and do the required adjustments
            string newHtml = tempWriter.ToString().Replace("</span>&nbsp;", "</span>");
 
            // write out the corrected html 
            output.Write(newHtml);
        }
    }
}

 And when i insert the assembly into my page layout i only throws

"An unexpected error has occurred. " 

I know my I have written the right thing in the page layout because if I exchange the code in the class library to inherit a image for example.

What can be wrong?

 Please help!