public virtual void Insert(int index, T item)
{
LongDecimal newRowId;
if (index == 0)
{
if (Tree.Count == 0)
{
newRowId = new LongDecimal(1);
}
else
{
newRowId = ((LongDecimal)Tree[0].Key).GetPredecessor();
}
}
else if (index == Tree.Count)
{
newRowId = ((LongDecimal)Tree[Tree.Count - 1].Key).GetSuccessor();
}
else
{
newRowId =
((LongDecimal)Tree[index - 1].Key).MidPoint(
(LongDecimal)Tree[index].Key);
}
Tree.Add(newRowId, item);
}
public LongDecimal MidPoint(LongDecimal that)
{
var result = new LongDecimal(0)
{
_doubleValue = (_doubleValue + that._doubleValue) / 2
};
if (result.Equals(this) || result.Equals(that))
{
return(null);
}
return(result);
}
