I am writing a poker application and trying to figure out how to deal with split pots

There are three round of betting and each round of betting can have multiple orbits

Can only bet the chips in front of you
So if a player is all in a side pot is created

Hands can tie - in which case the pot is split

PlayerA all in 40 Win
PlayerB 80 second
PlayerC 80 last

Player A would take 120 (win 80 as 40 was his money in)
Player B would take 80

But you don't know the order until the end
And when PlayerA went in you don't know how many people are going to call

What could be good algorithm for this?

This code is C# but really just looking for an approach.