/// <summary>
/// Remove the first element from the list of results.
/// </summary>
public void RemoveFirst()
{
if (BackingDictionary.Count > 0)
{
object key = BackingDictionary.GetKey(0);
int firstCount = (int)BackingDictionary[key];
if (firstCount == 1)
{
BackingDictionary.RemoveAt(0);
}
else
{
BackingDictionary[key] = firstCount - 1;
}
--Count;
}
}