StopwatchImpl
using System.Diagnostics;
using System.Runtime.CompilerServices;
namespace System.Reactive.Concurrency
{
internal class StopwatchImpl : IStopwatch
{
[System.Runtime.CompilerServices.Nullable(1)]
private readonly Stopwatch _sw;
public TimeSpan Elapsed => _sw.Elapsed;
public StopwatchImpl()
{
_sw = Stopwatch.StartNew();
}
}
}