public static Tuple <Type, IEnumerable <Type> > GetCommonBases(Type left, Type right)
{
var tree = new TypeTree(left);
tree.Add(right);
var findLeft = tree.Find(left);
var findRight = tree.Find(right);
var commonInterfaces =
findLeft.Interfaces.Select(i => i.Value)
.Intersect(findRight.Interfaces.Select(i => i.Value))
.Distinct();
var leftStack = new Stack <TypeTree>();
var temp = findLeft;
while (temp != null)
{
leftStack.Push(temp);
temp = temp.Parent;
}
var rightStack = new Stack <TypeTree>();
temp = findRight;
while (temp != null)
{
rightStack.Push(temp);
temp = temp.Parent;
}
var zippedPaths = leftStack.Zip(rightStack, Tuple.Create);
var result = zippedPaths.TakeWhile(tup => tup.Item1.Value == tup.Item2.Value).Last();
return(Tuple.Create(result.Item1.Value, commonInterfaces));
}