Thread Safe Method with a Stop Watch

Thread Safe Method with a Stop Watch

I'm trying to determine if my code I'm using is Thread Safe or not. I'm
basically trying to call a method several times from different threads,
and capture the time it takes for certain calls within the method to
complete.
Here is an example of what I am doing.
using System;
using System.Collections.Concurrent;
using System.Diagnostics;
using System.Linq;
using System.Threading.Tasks;
namespace ThreadTest
{
class Program
{
static BlockingCollection<TimeSpan> Timer1 = new
BlockingCollection<TimeSpan>(new ConcurrentBag<TimeSpan>());
static TimeSpan CaptureTime(Action action)
{
Stopwatch stopwatch = Stopwatch.StartNew();
action();
stopwatch.Stop();
return stopwatch.Elapsed;
}
static void ThreadFunction()
{
TimeSpan timer1 = new TimeSpan();
timer1 = CaptureTime(() =>
{
//Do Some Work
});
Timer1.Add(timer1);
}
static void Main(string[] args)
{
for (int i = 0; i < 50; i++)
{
var task = new Task(ThreadFunction);
task.Start();
}
}
}
}
And what I'm trying to determine is whether or not the TimeSpan values
returned by the CaptureTime method can be trusted.
Thank you to anyone who can enlighten me.