Foreach can throw an InvalidCastException?

Question

Imagine the following code:

class foreach_convert
{
    public static void method2()
    {
        List x = new List();         


        

Answer 1

foreach works on IEnumerable, which returns objects of type object. For every item, the object will be cast to the type you provided.

Unless you use var in C# 3.0. Then the type will be taken from IEnumerable, if it is implemented by the collection.