How do I convert an Array to a List<object> in C#?

List<object> list = myArray.Cast<Object>().ToList();

If the type of the array elements is a reference type, you can leave out the .Cast<object>() since C#4 added interface co-variance i.e. an IEnumerable<SomeClass> can be treated as an IEnumerable<object>.

List<object> list = myArray.ToList<object>();

Use the constructor: new List<object>(myArray)

List<object>.AddRange(object[]) should do the trick. It will avoid all sorts of useless memory allocation. You could also use Linq, somewhat like this: object[].Cast<object>().ToList()