vb.net function in linq conversion

Hi,
I have the below function in linq format that i want to translate to a normal function i.e. one without linq as i havent learned linq yet. NB I know i should and i will!
NB Customers is an observablecollection property
 
function getCustomerId(id as integer)
return Customers.First(Function(x)x.id=id)
end function
 
Thanks for any help!