private static async Task SendMessages(IServiceBusManager serviceBusManager)
{
string label1 = "First";
string json1 = @"{'Name':'James'}";
string label2 = "Second";
string json2 = @"{'Name':'James'}";
await serviceBusManager.SendMessage(label1, json1);
await Task.Delay(3);
await serviceBusManager.SendMessage(label2, json2);
}