Format TimeSpan to mm:ss for positive and negative TimeSpans

Question

I\'m looking for a solution in .net 3.5 I wrote the following working solution:

private string FormatTimeSpan(TimeSpan time)
{
    return String.Format(\"{0}{1:0         


        

Answer 1

Somewhat shorter, using Custom TimeSpan Format Strings:

private string FormatTimeSpan(TimeSpan time)
{
    return ((time < TimeSpan.Zero) ? "-" : "") + time.ToString(@"mm\:ss");
}