How to get the first element of IEnumerable

Is there a better way getting the first element of IEnumerable type of this:

foreach (Image image in imgList)
{
     picture.Width = (short)image.Columns;
     picture.Height = (short)image.Rows;
     break;
}

This is the exact declaration of the type:

public class ImageList : IEnumerable, IDisposable