Loop Multiple Arrays in C# – Short way

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Let us see a trick to loop multiple arrays in C#. Consider the following program:

static void Main(string[] args)
{
    var arr1 = new[] { 5, 3, 4, 2, 6, 7 };
    var arr2 = new[] { 4, 9, 3, 1, 9, 4 };
    var arr3 = new[] { 2, 1, 8, 7, 4, 9 };

    foreach (int num in arr1)
        Print(num);

    foreach (int num1 in arr2)
        Print(num1);

    foreach (int num2 in arr3)
        Print(num2);

}

static void Print(int i)
{
    Console.WriteLine(i);
}
}

As you can see, we are using three loops to print the contents of the array. Using the LINQ Concat operator, we can shorten the code by reducing three loops into just one, as shown below

If you liked this tip, check some more LINQ Tips

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About The Author

Suprotim Agarwal, Developer Technologies MVP (Microsoft Most Valuable Professional) is the founder and contributor for DevCurry, DotNetCurry and SQLServerCurry. He is the Chief Editor of a Developer Magazine called DNC Magazine. He has also authored two Books - 51 Recipes using jQuery with ASP.NET Controls. and The Absolutely Awesome jQuery CookBook.

Follow him on twitter @suprotimagarwal.