I have created a custom control which holds a button in it. The button is styled, so as to hold a grid with two rows, an image in the first and a TextBlock in the second. I have written an Event Handler for the custom control. When the mouse enters the path of the object the MouseEnter event fires, where I try to change the TextBlock's FontSize and Foreground color, however the control does not update. In contrast, I have tried to modify an regular TextBlock's(not part a custom control and controltemplate) properties, and they update correctly, on the fly.

What am I missing here?? Here is the code for the event handler:

private void ThemeButton_MouseEnter(object sender, MouseEventArgs e)
{
    InitializeProperties();

    TextElement.FontSize = 16;
    TextElement.Text = "new text";
    TextElement.Foreground = Brushes.Red;

    TextBlock element = MainWindow.FindChild<TextBlock>(MainWindow.StartWindow, "textField");
    element.Text = "new text for regular textblock";
    element.Foreground = Brushes.Red;
}

InitializeProperties is a methid that initializes TextElement(typeof TextBlock) and ImageElement(typeof Image) properties. They are not null. The properties are just regular .NET properties.