public static T SafeInvoke <T>(
this WebBrowser webBrowser,
Func <WebBrowser, T> call)
{
if (!webBrowser.Visible)
{
throw new InvalidOperationException("The control is not visible.");
}
if (!webBrowser.InvokeRequired)
{
return(call(webBrowser));
}
var result = webBrowser.BeginInvoke(call, webBrowser);
var endResult = webBrowser.EndInvoke(result);
return((T)endResult);
}