C# Return Value if contain value from multiple textboxes winform

Question

Hi,

I would like some help. If I have five or more textboxes, I want to return the value to another textbox only if they contain values.

For example:

example-1		or	example-2
label	textbox		label	textbox
RED	10		RED
BLUE			BLUE	1
BLACK	2		BLACK

 

WHITE			WHITE
other	1		other	1
label	textbox		label	textbox
RED	10		blue	1
BLACK	2		other	1

 

Thanks in advance,

Varta.