How can I print the contents of an array horizontally?

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You are probably using Console.WriteLine for printing the array. 

int[] array = new int[] { 1, 2, 3 };
foreach(var item in array)
{
    Console.WriteLine(item.ToString());
}

If you don’t want to have every item on a separate line use Console.Write:

int[] array = new int[] { 1, 2, 3 };
foreach(var item in array)
{
    Console.Write(item.ToString());
}

or string.Join<T> (in .NET Framework 4 or later):

int[] array = new int[] { 1, 2, 3 };
Console.WriteLine(string.Join(",", array));

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