[c#] How to sum up an array of integers in C#

Is there a better shorter way than iterating over the array?

int[] arr = new int[] { 1, 2, 3 };
int sum = 0;
for (int i = 0; i < arr.Length; i++)
    sum += arr[i];


Better primary means cleaner code but hints on performance improvement are also welcome. (Like already mentioned: splitting large arrays).

It's not like I was looking for killer performance improvement - I just wondered if this very kind of syntactic sugar wasn't already available: "There's String.Join - what the heck about int[]?".

This question is related to c# arrays integer

The answer is

Provided that you can use .NET 3.5 (or newer) and LINQ, try

int sum = arr.Sum();

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