配列コピーするのに↓だとできるのに static string[,] ArrayCopy(string[,] array1, int sourceIndex, int destinationIndex, int length) { string[,] array2 = new string[array1.GetLength(0), array1.GetLength(1)];
for (int a = 0; a < length; a++) { for (int b = 0; b < array1.GetLength(1); b++) { array2[a + destinationIndex, b] = array1[a + sourceIndex,b]; } } return array2; }
↓だとできないのはなぜか教えろ static string[,] ArrayCopy(string[,] array1, int sourceIndex, int destinationIndex, int length,string[,]array2) { for (int a = 0; a < length; a++) { for (int b = 0; b < array1.GetLength(1); b++) { array2[a + destinationIndex, b] = array1[a + sourceIndex,b]; } } return array2; }
