How do I concatenate two arrays in C#?

c# arrays .net linq
hwiechers picture hwiechers · Oct 10, 2009 · Viewed 337.2k times · Source 
int[] x = new int [] { 1, 2, 3};
int[] y = new int [] { 4, 5 };

int[] z = // your answer here...

Debug.Assert(z.SequenceEqual(new int[] { 1, 2, 3, 4, 5 }));

Right now I use 

int[] z = x.Concat(y).ToArray();

Is there an easier or more efficient method?

Answer

Zed picture Zed · Oct 10, 2009 
var z = new int[x.Length + y.Length];
x.CopyTo(z, 0);
y.CopyTo(z, x.Length);

Related questions

printing all contents of array in C#

I am trying to print out the contents of an array after invoking some methods which alter it, in Java I use: System.out.print(Arrays.toString(alg.id)); how do I do this in c#?

Read More
Conversion from Int array to string array

When I am converting array of integers to array of string, I am doing it in a lengthier way using a for loop, like mentioned in sample code below. Is there a shorthand for this? The existing question and answers …

Read More
Getting a collection of index values using a LINQ query

Is there a better way to do this? string[] s = {"zero", "one", "two", "three", "four", "five"}; var x = s .Select((a,i) => new {Value = a, Index = i}) .Where(b => b.Value.StartsWith("t")) .Select(c => c.Index); …

Read More