Functions.Templates/Templates/CosmosDBTrigger-CSharp-3.x/CosmosDBTriggerCSharp.cs

using System;
using System.Collections.Generic;
using Microsoft.Azure.Documents;
using Microsoft.Azure.WebJobs;
using Microsoft.Azure.WebJobs.Host;
using Microsoft.Extensions.Logging;

namespace Company.Function
{
    public static class CosmosDBTriggerCSharp
    {
        // This template uses an outdated version of the Azure Cosmos DB extension. Learn about migrating to the new extension at https://aka.ms/migrate-to-cosmos-extension-v4
        [FunctionName("CosmosDBTriggerCSharp")]
        public static void Run([CosmosDBTrigger(
            databaseName: "DatabaseValue",
            collectionName: "CollectionValue",
            ConnectionStringSetting = "ConnectionValue",
            LeaseCollectionName = "leases")]IReadOnlyList<Document> input,
            ILogger log)
        {
            if (input != null && input.Count > 0)
            {
                log.LogInformation("Documents modified " + input.Count);
                log.LogInformation("First document Id " + input[0].Id);
            }
        }
    }
}