How Can I Efficiently Cast a List to a List in C#?

Casting from a List to a List with Less Code

The conversion from a list of items of type X to type Y, where X can be cast to Y, is possible one item at a time:

List<Y> ListOfY = new List<Y>();

foreach(X x in ListOfX)
    ListOfY.Add((Y)x);

However, a more concise method exists for casting the entire list at once:

List<Y> listOfY = listOfX.Cast<Y>().ToList();

Considerations for Using This Method:

• It does not cast the list itself but rather each item within it.
• A new List is created through the call to ToList().
• It relies on the System.Linq namespace for its functionality.
• It only supports implicit cast operators, excluding custom ones and those with explicit operators in Framework 4.0.

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