/// <summary>
///
/// </summary>
/// <param name="lowKey"></param>
public void RemoveRangeFrom(K lowKey)
{
sortedpairs.RemoveRangeFrom(new KeyValuePair <K, V>(lowKey));
}
/// <summary>
///
/// </summary>
/// <param name="lowKey"></param>
public void RemoveRangeFrom(K lowKey)
{
sortedpairs.RemoveRangeFrom(new KeyValuePair <K, V>(lowKey));
}