Performance - before using a foreach loop check if the list is empty

when using a foreach loop in Unity I need to call this in the update method. So it's called once per frame...

I want to know, if it is better to check the count of the list before using the foreach loop or if it is redundant.

So I have

if (myList.Count > 0)
{
    foreach (Type type in myList)
    {
    }
}

and

foreach (Type type in myList) // no need for a check before
{
}

I could also use

for (int i = 0; i < myList.Count; i++) // use a for loop instead
{
    myList[i].DoSomething();
}