How to concatenate a list of strings together, with a comma between each value?

Question

I need help with this code. I want to split words in foreach loop like this but I don't want a , after the last word. Any suggestions?

var listOtherWords = (from o in Words
                      where !o.ToUpper().StartsWith("A")
                      where !o.ToUpper().StartsWith("B")
                      where !o.ToUpper().StartsWith("C")
                      select o).ToList();

Console.WriteLine();
Console.Write("Other Words: ");

foreach (string o in lisOtherWords)
{
    Console.Write(o + " ,");
}

Console.ReadLine();

Possible duplicate of Concat all strings inside a List<string> using LINQ — mjwills
– mjwills, Commented Dec 9, 2018 at 11:01

Salah Akbari · Accepted Answer · 2018-12-09 11:27:17Z

6

You can either use String.Join method:

Console.Write(string.Join(" ,", listOtherWords));

Or use \b \b":

foreach (string o in listOtherWords)
{
    Console.Write(o + " ,");
}

Console.Write("\b \b");

It moves the caret back, then writes a whitespace character that overwrites the last character and moves the caret forward again.

edited Dec 9, 2018 at 11:27

answered Dec 9, 2018 at 10:44

Salah Akbari

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Ousmane D. · Accepted Answer · 2018-12-09 10:37:36Z

1

you would be better off using string.Join:

Console.Write(string.Join(" ,", lisOtherWords));

answered Dec 9, 2018 at 10:37

Ousmane D.

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Comments

Bizhan · Accepted Answer · 2018-12-09 10:55:11Z

0

Other than Join You can also use Aggregate method:

string line = listOtherWords.Aggregate((a,b) => $"{a} ,{b}");

The only difference is that you will be able to add additional logic to your loop. e.g:

string line = listOtherWords.Aggregate((a,b) =>
{
    if(...) ...
    return $"{a} ,{b}";
});

answered Dec 9, 2018 at 10:55

Bizhan

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