C# System.InvalidCastException

Question

Why I\'m getting this error?

System.InvalidCastException was u         


        

Answer 1

The following solves your cross thread issue.

public delegate string GetStringHandler();
public string GetDocumentText()
{
    if (InvokeRequired)
        return Invoke(new GetStringHandler(GetDocumentText)) as string;
    else
        return webBrowser.DocumentText;
}

if (regAddId.IsMatch(GetDocumentText()))
{
}