>>>>>>I think there's a simple answer to this but I can't think of it or find it.
>>>>>>I want to set the character casing of all textboxes on a form to upper.
>>>>>>I get this far and can't access the charactercasing property of the control.
>>>>>>Any help appreciated.
>>>>>>
>>>>>>

>>>>>>      foreach (Control c in parentForm.Controls)
>>>>>>            {
>>>>>>                if (c is TextBox)
>>>>>>                {
>>>>>>
>>>>>>                }
>>>>>>            }
>>>>>>

>>>>>
>>>>>Did you try instead (not tested)
>>>>>

>>>>>var c as TextBox
>>>>>
>>>>>if (c!=null)
>>>>> {
>>>>>
>>>>>  }

>>>>>
>>>>>See
>>>>>
>>>>>https://msdn.microsoft.com/en-us/library/cscsdfbt.aspx?f=255&MSPPError=-2147217396
>>>>
>>>>
>>>>Thanks, Naomi
>>>>
>>>>I woke up from my trance and this did it
>>>>
>>>>

>>>>
>>>> foreach (Control c in parentForm.Controls)
>>>>            {
>>>>                if (c is TextBox)
>>>>                {
>>>>                    TextBox tb = c as TextBox;
>>>>                    tb.CharacterCasing = CharacterCasing.Upper;
>>>>                }
>>>>            }
>>>>

A Linq way:

foreach (Control c in parentForm.Controls.Where(x=>x is TextBox))
>>>            {
>>>                ((TextBox)c).CharacterCasing = CharacterCasing.Upper;
>>>            }

>>
>>Thank you, Viv.
>>I couldn't think of this syntax.
>>

>>((TextBox)c).CharacterCasing = CharacterCasing.Upper;
>>

>>The one I used worked but I prefer this one and I substituted it.
>
>A better LINQ way:
>

foreach (TextBox c in parentForm.Controls.OfType< TextBox>())
>            {
>                c.CharacterCasing = CharacterCasing.Upper;
>            }

Good. I'd forgotten about OfType(). Don't know if it's any faster because, internally, I think it does a 'is X' anyway ?