public void Dispose()
{
var mre = new ManualResetEventSlim();
SempahoreStateMachine.SendAsync(-1, CancellationToken).GetAwaiter().OnCompleted(() => mre.Set());
mre.Wait(CancellationToken.None);
}
public async Task EnterAsync()
{
await SempahoreStateMachine.SendAsync(1, CancellationToken);
}