static ImageHelper()
{
Task.Factory.StartNew(() =>
{
var sec = TimeSpan.FromSeconds(30);
while (true)
{
Thread.Sleep(sec);
var now = DateTime.Now;
var sb = Bitmaps.Where(k => now - k.Value.Item1 > sec).ToList();
for (var i = 0; i < sb.Count; i++)
{
var keyValuePair = sb[i];
Bitmaps.TryRemove(keyValuePair.Key, out _);
}
Logger.LogDebug($"cleared {sb.Count} cached images");
}
}, TaskCreationOptions.LongRunning);
}