How to correctly add an element to an array?

Question

.NET

For the function to work, you need to pass an array to it in this form: But in this case, the elements are added to it immediately. What if I need to fill this array with 0? Let's say I have a file with numbers, I go through each line, convert the line to a number. And how do I write this number into an existing array?
var ids = new long[] { 181105378, 252264908 };

Answer 1

Use List. And if you really need an array, then List can then be converted to an array.