How can I declare a non-writable array in C#?

Question

Currently, my code resembles this:

private static readonly int[] INTARRAY = {1, 2, 3};

This prevents me from assigning to INTARRAY to a new instance of int[] outside of the static constructor, but it still allows me to assign to the individual int elements.
For example:

INTARRAY[1] = 5;

How can I make this array completely read-only? This is an array of value-types, and is assigned with an array initializer in the declaration. How can I make these initial values persist indefinitely?

Answer 1

If it's an array, you can't. But if you're willing for it to be an IList<int> , you can do:

private static readonly IList<int> INTARRAY = new List<int> {1, 2, 3}.AsReadOnly();

Answer 2

unfortunately, there is no builtin c# construct that provides this feature for arrays. Best solution is to use a List instead if it conforms with your business needs

Answer 3

如果您完全使用数组，则可以在数组周围编写一个简单的包装类，并使用只读索引器访问元素。