Check out example codes for "get access to all controls with a specific tag in C#". It will help you in understanding the concepts better.

Code Example 1

private void FindTag(Control.ControlCollection controls)
{
    foreach (Control c in controls)
    {
        if (c.Tag != null)
        //logic

       if (c.HasChildren)
           FindTag(c.Controls); //Recursively check all children controls as well; ie groupboxes or tabpages
    }
}

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