c# - 有关与关键字/保留字 “out”中的使用有关的编译错误的问题

Question

你好
我的代码有错误:
“必须在控制离开当前方法之前将out参数'o_BlockingSquaresArr'分配给”
现在，此错误将每个方法的每个return语句用最后一个红色绘制。
我不明白我的特定代码有什么问题
请帮我，
提前致谢

internal bool isLegalMove(Square i_Move, out List<Square> o_BlockingSquaresArr) 
{
     bool result;

     if (m_GameBoard[i_Move.RowIndex, (int)i_Move.ColIndex].Coin != null)   
     {
          result = false;
          m_MessageBuffer = "You have enterd a square which is already
                             occupied, please try again...";       

          m_ErrorFlag=true;                                                                               
     }
     else
     {
          result = checkIfThereIsAtLeastOneSeqInOneDirection(i_Move,out o_BlockingSquaresArr);       
     }
     return result;

}

internal bool checkIfThereIsAtLeastOneSeqInOneDirection(Square i_Move, out List<Square> o_BlockingSquaresArr)
{
    const int k_EightDirections = 8;
    bool isSequenceFound, finalRes = false;

    for (int i = 1; i <= k_EightDirections; i++)    
    {
        isSequenceFound = checkOpponentSequenceInDirection(i_Move, (eDirections)i, out o_BlockingSquaresArr);     
        if (isSequenceFound)
        {
            finalRes = true;                                                                                      
        }                                                                                                         

    }
    return finalRes;
}

internal bool checkOpponentSequenceInDirection(Square i_Move, eDirections i_Direction, out List<Square> o_BlockingSquaresArr) 
{
     //I've shortened this code only relevant things  
     Square o_AdjacentSquare = new Square();
     adjacentCoin = doSwitchAndRetrieveAdjacentCoin(i_Move, i_Direction, out o_AdjacentSquare);

     // ...

     if (isThereAnOpponentSequence)
     {
          o_BlockingSquaresArr.Add(o_AdjacentSquare); 
     }
     return isThereAnOpponentSequence;
}

Answer 1

如编译器错误所述，必须在方法的任何非异常返回之前明确指定out参数。我在任何地方都看不到对o_BlockingSquaresArr的任何分配。为什么甚至将它声明为out参数呢？