Remove 2 or more blank spaces from a string in c#..?

Question

what is the efficient mechanism to remove 2 or more white spaces from a string leaving single white space.

I mean if string is "a____b" the output must be "a_b".

Answer 1

You can use a regular expression to replace multiple spaces:

s = Regex.Replace(s, " {2,}", " ");

Answer 2

Something like below maybe:

var b=a.Split(new char[] {' '}, StringSplitOptions.RemoveEmptyEntries);
var noMultipleSpaces = string.Join(" ",b);

Answer 3

string tempo = "this    is    a     string    with    spaces";
RegexOptions options = RegexOptions.None;
Regex regex = new Regex(@"[ ]{2,}", options);     
tempo = regex.Replace(tempo, @" ");