Derogation from the row of the sign

[emran]

Got a list.

List<string> lst = new List<string>(){"Привет",",","дорогой","друг","."};

I'm moving the list to the line.

var data = string.Join(" ", lst);

As we should have expected, the exit line came

Привет , дорогой друг .

I don't like the commas too far from the text. Is there any way to use it? Join To the sign of retaliation?

[Bogopo]

List<string> lst = new List<string>(){"Привет",",","дорогой","друг","."};

//массив символов
//для исключения пробела между ними
var excludes = new HashSet<string> {",","."};

var result = string.Empty;

foreach(var s in lst)
{
    result += excludes.Contains(s) ? s : String.Concat(" ", s);
}

The result will be as follows: Hello, dear friend.

example https://dotnetfiddle.net/FFwt6M

---

As the commentaries have noticed, it is better to form this by extension, for example:

public static class StringExtensions
{

public static string НазваниеМетода(this List<string>, HashSet<string> punctuations)

{

string result = string.Empty;

foreach(var s in lst)

{

result += punctuations.Contains(s) ? s : String.Concat(" ",s);

}

return result;

}

}

This will have to be applied:

var result = lst.НазваниеМетода(excludes);

The same result