McpServer/McpStudy.McpServerStdio/Program.cs

using System;
using System.ComponentModel;
using Microsoft.Extensions.Hosting;
using Microsoft.Extensions.Logging;
using Microsoft.Extensions.DependencyInjection;

using ModelContextProtocol.Server;

namespace McpStudy.McpServerStdio
{
    internal class Program
    {
        static async Task Main(string[] args)
        {
            try
            {
                var builder = Host.CreateApplicationBuilder(args);
                builder.Logging.AddConsole(options =>
                {
                    options.LogToStandardErrorThreshold = LogLevel.Trace;
                });

                builder.Services
                    .AddMcpServer()
                    .WithStdioServerTransport()
                    .WithToolsFromAssembly();

                await builder.Build().RunAsync();

            }
            catch (Exception e)
            {
                Console.WriteLine(e.Message);
            }
            finally
            { 
               
            }
        }
    }
}

[McpServerToolType]
public static class TimeTool
{
    [McpServerTool, Description("Get the current time for a city")]
    public static string GetCurrentTime(string city)
    { 
        var message = $"It is {DateTime.Now.Hour}:{DateTime.Now.Minute} in {city}.";

        File.AppendAllText("Mcplog.txt", $"{message}{System.Environment.NewLine}");
        return  message;
    }
       
}