c#类里面的二维数组，byte[]初始化问题，求解

class CStareim
{

   private int[][] _ImRes;               //图像数据二维数组初始化
    public int[][] ImRes
    {
        get
        {
            return _ImRes;
        }
        set
        {
            this._ImRes = value;
            //OnPropertyChanged("Name");
        }
    }

    private byte[] _picout;              //byte[]picout初始化
    public byte[] picout
    {
        get
        {
            return _picout;
        }
        set
        {
            this._picout = value;
            //OnPropertyChanged("Name");
        }
    }
    public CStareim()
    {
        this.RealTime = "";
        this.Band = "";

        this.picout=0 ;//怎么初始化
        this.ImRes=0 ;  //怎么初始化

       }

}

 _ImRes = new int[数组长度][];
for (int i = 0; i < 数组长度; i++) 
_ImRes[i] = new int[第二维长度];