Use regular expression
RegexOptions options = RegexOptions.None;
Regex regex = new Regex(@”[ ]{2,}”, options);
tempo = regex.Replace(tempo, @” “);
VB.Net
Dim str As String = “Sample space 01″
Dim opts As RegexOptions = RegexOptions.None
Dim regx As New Regex(“[ ]{2,}”, opts)
str = regx.Replace(str, ” “)