public IEnumerable <OperationTable> GetSolutions()
{
int n = this.elements.Count;
for (int k = 0; k < n; k++)
{
for (int j = 0; j < n; j++)
{
if (this.cells[k, j] != null)
{
continue;
}
foreach (IElement element in this.elements)
{
OperationTable table = this.GetCompatibleTable(this.elements[k], this.elements[j], element);
if (table != null)
{
foreach (OperationTable solution in table.GetSolutions())
{
yield return(solution);
}
}
}
yield break;
}
}
yield return(this);
}
