using Microsoft.Azure.Cosmos
public class Test
{
[JsonProperty(PropertyName = "CategoryId")]
public int Id { get; set; }
}
public async Task AddItemsAsync(CosmosClient cosmosClient, Database database, Container container)
{
Test test = new Test();
test.Id = 0;
ItemResponse<Test> testResponse = await container.CreateItemAsync<Test>(test, new PartitionKey("<Your partition key>"));
Console.WriteLine("Created item in database with id: {0} Operation consumed {1} RUs.
"
, testResponse.Resource.Id, testResponse.RequestCharge);
}