i need to do . a grid form in XAMARIN

in vb.net
i have problem with setting the rowdefinition and columdefinition.

can some body show me a example of who can i do it?

i do.
function dashboard as Grid
dim layouts = new New Grid

AND now i have problem to define rowdefinicon

dim texts = label
texts = "my text"

layouts.Children.Add(texts,1,0)

return layouts
end function

WHAT I NEED TO DO IS.
set row 1 and column 1
SIZE and other parameter

PLEASE HELP ..
show me example i i do the rest