public static System.Collections.ArrayList Modes(this System.Collections.ArrayList x)
{
IEnumerable <KeyValuePair <object, uint> > frequencies = x.Frequencies();
System.Collections.ArrayList modes = new System.Collections.ArrayList();
uint occurences = ((KeyValuePair <object, uint>)frequencies?.ElementAt(0)).Value;
foreach (KeyValuePair <object, uint> kvp in frequencies)
{
if (occurences == kvp.Value)
{
modes.Add(kvp.Key);
}
}
return(modes);
}