public string this[TwoForm <string, int> k]
{
get
{
string r;
try
{
r = arguments[k];
}
catch (KeyNotFoundException)
{
r = null;
}
return(r);
}
}
public bool Equals(TwoForm <T, K> b)
{
return(isK == b.isK && ((isK && kval.Equals(b.kval)) || (!isK && tval.Equals(b.tval))));
}