How to copy array of an object into the array of another object in c#?

Question

I have defined 2 classes and some objects like these:

public class MyClass
{
public int[] numbers { get; set; }
//some other properties
}

public class DemoClass
{
//some other properties
public int[] numbers { get; set; }
//some other properties
}

var myObject= new MyClass();
var sourceObject= new DemoClass{
                       numbers={1,2,3}
                       //other properties 
                      }

Now, I want to copy the array of sourceObject into the array of myObject. What is the best approach?

myObject.numbers= sourceObject.numbers;

or

myObject.numbers= (int[])sourceObject.numbers.Clone();

I'd use .ToArray()... But really it mostly taste choice... and a bit of whether you actually need a "copy" (as the title says) or the same reference as the sample code in the post shows. — Alexei Levenkov
– Alexei Levenkov, Commented Sep 8, 2022 at 4:44
Note that your first option does not create a copy at all, but rather keep a reference to the same array from sourceObject.numbers. — wohlstad
– wohlstad, Commented Sep 8, 2022 at 4:51
@wohlstad yeah I know that, and actually I think it is not a good one... — Joy
– Joy, Commented Sep 8, 2022 at 4:53
This is not opinion-based as one option does and one doesn't actually create a copy of the data. I'd go for myObject.numbers= sourceObject.numbers.ToArray(); , too. — TaW
– TaW, Commented Sep 8, 2022 at 5:52

Enigmativity · Accepted Answer · 2022-09-08 06:49:03Z

0

I would use this:

myObject.numbers = sourceObject.numbers.ToArray();

Since sourceObject.numbers is an int[] then, under the hood, LINQ uses Array.Copy anyway.

answered Sep 8, 2022 at 6:49

Enigmativity

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