microsoft/teams.net

using Microsoft.Bot.Builder.Integration.AspNet.Core;
using Microsoft.Teams.Apps.Activities;
using Microsoft.Teams.Apps.Extensions;
using Microsoft.Teams.Plugins.AspNetCore.Extensions;

using Samples.BotBuilder;

var builder = WebApplication.CreateBuilder(args);
builder
    .AddTeams()
    .AddBotBuilder<Bot, BotBuilderAdapter, ConfigurationBotFrameworkAuthentication>();

var app = builder.Build();

var teams = app.UseTeams();

teams.OnMessage(async (context, cancellationToken) =>
{
    await context.Typing(cancellationToken: cancellationToken);
    await context.Send("hi from teams...", cancellationToken);
});

app.Run();