private static void Main(string[] args)
{
var client = new AddClient();
Console.WriteLine("Add Api Call" + client.AddAsync(2, 3).GetAwaiter().GetResult());
var client2 = new SubtractClient();
Console.WriteLine("Subtract Api Call" + client2.SubtractAsync(2, 3).GetAwaiter().GetResult());
Console.WriteLine("Add Api Call" + client.AddAsync(2, 3).GetAwaiter().GetResult());
Console.WriteLine("Subtract Api Call" + client2.SubtractAsync(2, 3).GetAwaiter().GetResult());
}