private static async Task Main(string[] args) { var myCosmosService = new CosmosService(); await myCosmosService.InitializeAsync(endpointUrl, accountKey); var newContact1 = new Contact { Id = Guid.NewGuid().ToString(), FirstName = "mithun", LastName = "shanbhag", Email = "*****@*****.**", City = "Bangalore" }; var newContact2 = new Contact { Id = Guid.NewGuid().ToString(), FirstName = "john", LastName = "doe", Email = "*****@*****.**", City = "Delhi" }; try { await myCosmosService.AddContactAsync(newContact1); await myCosmosService.AddContactAsync(newContact2); foreach (var contact in await myCosmosService.ListContactsAsync()) { } var contactToModify = await myCosmosService.GetContactAsync(newContact2.Id); contactToModify.FirstName = "Jane"; await myCosmosService.UpdateContactAsync(contactToModify.Id, contactToModify); } finally { //await myCosmosService.DeleteContactAsync(newContact1.Id); //await myCosmosService.DeleteContactAsync(newContact1.Id); } }