Cannot convert from Link to RelatedLink !!

[avecreep]

Hi,

i have the following lines of code:

foreach (Link link in workItem.Links)

{

RelatedLink relatedLink = link as RelatedLink;
if (relatedLink != null)

{

WorkItem relatedWorkItem = workItem.Store.GetWorkItem(relatedLink.RelatedWorkItemId);
txtTaskHistory.Text = relatedWorkItem.Id.ToString();

}

else

MessageBox.Show("there is a mistake");

}

When i debug, i see that link is not null, but relatedLink becomes null after the line
RelatedLink relatedLink=link as RelatedLink and displays error message.
Can anyone tell me what is wrong with it?

Thank you..