如何使用csharp向微软团队频道发送简单的消息？

using Microsoft.Graph;
using Microsoft.Graph.Auth;
using Microsoft.Identity.Client;
using System;
using System.Threading.Tasks;

class Program
{
    static async Task Main(string[] args)
    {
        string clientId = "YourClientId";
        string clientSecret = "YourClientSecret";
        string tenantId = "YourTenantId";
        string teamId = "YourTeamId";
        string channelId = "YourChannelId";

        IConfidentialClientApplication confidentialClientApplication = ConfidentialClientApplicationBuilder
            .Create(clientId)
            .WithClientSecret(clientSecret)
            .WithAuthority($"https://login.microsoftonline.com/{tenantId}")
            .Build();

        ClientCredentialProvider authProvider = new ClientCredentialProvider(confidentialClientApplication);

        GraphServiceClient graphClient = new GraphServiceClient(authProvider);

        var chatMessage = new ChatMessage
        {
            Body = new ItemBody
            {
                Content = "Hello from C#!"
            }
        };

        await graphClient.Teams[teamId].Channels[channelId].Messages
            .Request()
            .AddAsync(chatMessage);

        Console.WriteLine("Message sent successfully!");
    }
}