List<Button> listButton = new List<Button>();
foreach (var control in wrapPanelContainer.Children)
{
     if(!(control is Button))
         continue;

     var button = control as Button;

     if (!button.Name.Contains("BtnTable"))
         continue;

     listButton.Add(button);
 }

 foreach (Button control in listButton)
     wrapPanelContainer.Children.Remove(control);