二维数组 string[,]

string[,] strArr = {
                               {"101","电脑"},
                               {"101","数码"},
                               {"104","仪器"}
                               };
            StringBuilder str = new StringBuilder();
            for (int i = 0; i < strArr.GetLength(0); i++)
            {
                str.Append(strArr[i, 0]);
                str.Append(strArr[i, 1]);
                str.Append("\t");
            }