how to auto sort button in c# form

hi!

how to i can auto sort button in the form?

my button in form:4 rows in 4 coloumns

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now app user change visible buttons:

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(underline is=>  button.visible=false)

if i want to with button.Location Buttons sorting in the form.I need a long time.

how to Auto Sort Buttons in the form?

And

how to effect fade out in button from form?

Example:http://msdn.microsoft.com/en-us/library/windows/apps/hh452703.aspx

plaese see video 2;

TIA...