在C#中，數組聲明有以下幾種技巧：
new來聲明數組并初始化：int[] numbers = new int[5];
{}來初始化數組元素：int[] numbers = {1, 2, 3, 4, 5};
var關鍵字來簡化聲明：var numbers = new int[5];
Array類的靜態方法創建數組：int[] numbers = Array.CreateInstance(typeof(int), 5) as int[];
int[,] matrix = new int[3, 3];
int[][] jaggedArray = new int[3][];
jaggedArray[0] = new int[3];
jaggedArray[1] = new int[4];
jaggedArray[2] = new int[2];
