c# - Foreach loop through controls that are textbox doesn't return

Question

I've used this code before in another program, but now I'm having trouble understanding why it won't run the code after my second line.

foreach (Control c in Controls)
    if (c.GetType() == typeof(TextBox)) //doesn't run any further
    {
        if ((string)c.Tag == "Filled")
        {
            ...
        }
        ...
    }

I'm either missing some minor little detail or something else is incorrect. Any ideas?

EDIT: my textboxes are inside a panel.

Answer 1

It might be simpler to do this:

foreach ( TextBox tb in this.Controls.OfType<TextBox>()) 
{
    if ((string)tb.Tag == "Filled")
    // .....
}