c# - 递归失败

Question

我写了一个递归函数。由于某种原因，它在第一次运行后不会调用自己。它只是从循环中取出下一个项目，而不深入。我正在使用 Visual Studio 10，而且 sleep 不足。

public IEnumerable<string> GeneratePath(int depth)
{
    int presentDepth = depth;
    char currentPosition = this.workingPath[presentDepth];
    presentDepth++;

    foreach (char nextPosition in this.moveTable.GetPossibleNextPositions(currentPosition))
    {
        this.workingPath[presentDepth] = nextPosition;

        if (presentDepth < (ChessPiece.targetDepth - 1))
        {
            Console.WriteLine("At least this wasn't ignored:{0}", new string(this.workingPath));
            this.GeneratePath(presentDepth);
        }
        else
            yield return new string(this.workingPath);
    }
}

Answer 1

this.GeneratePath(presentDepth);

应该是

foreach (var i in this.GeneratePath(presentDepth))
{
  yield return ...
}