diff --git a/java.md b/java.md
index b5e38e8..db0ffb4 100644
--- a/java.md
+++ b/java.md
@@ -1,21 +1,126 @@
-// Refer to document:  https://github.com/nacos-group/nacos-examples/tree/master/nacos-spring-cloud-example/nacos-spring-cloud-config-example
-package com.alibaba.nacos.example.spring.cloud.controller;
+/*
+Demo for Basic Nacos Opreation
+App.csproj
 
-import org.springframework.beans.factory.annotation.Value;
-import org.springframework.cloud.context.config.annotation.RefreshScope;
-import org.springframework.web.bind.annotation.RequestMapping;
-import org.springframework.web.bind.annotation.RestController;
+<ItemGroup>
+  <PackageReference Include="nacos-sdk-csharp" Version="${latest.version}" />
+</ItemGroup>
+*/
 
-@RestController
-@RequestMapping("/config")
-@RefreshScope
-public class ConfigController {
+using Microsoft.Extensions.DependencyInjection;
+using Nacos.V2;
+using Nacos.V2.DependencyInjection;
+using System;
+using System.Collections.Generic;
+using System.Threading.Tasks;
 
-    @Value("${useLocalCache:false}")
-    private boolean useLocalCache;
+class Program
+{
+    static async Task Main(string[] args)
+    {
+        string serverAddr = "http://localhost:8848";
+        string dataId = "application-prod.yml";
+        string group = "DEFAULT_GROUP";
 
-    @RequestMapping("/get")
-    public boolean get() {
-        return useLocalCache;
+        IServiceCollection services = new ServiceCollection();
+
+        services.AddNacosV2Config(x =>
+        {
+            x.ServerAddresses = new List<string> { serverAddr };
+            x.Namespace = "cs-test";
+
+            // swich to use http or rpc
+            x.ConfigUseRpc = true;
+        });
+
+        IServiceProvider serviceProvider = services.BuildServiceProvider();
+        var configSvc = serviceProvider.GetService<INacosConfigService>();
+
+        var content = await configSvc.GetConfig(dataId, group, 3000);
+        Console.WriteLine(content);
+
+        var listener = new ConfigListener();
+
+        await configSvc.AddListener(dataId, group, listener);
+
+        var isPublishOk = await configSvc.PublishConfig(dataId, group, "content");
+        Console.WriteLine(isPublishOk);
+
+        await Task.Delay(3000);
+        content = await configSvc.GetConfig(dataId, group, 5000);
+        Console.WriteLine(content);
+
+        var isRemoveOk = await configSvc.RemoveConfig(dataId, group);
+        Console.WriteLine(isRemoveOk);
+        await Task.Delay(3000);
+
+        content = await configSvc.GetConfig(dataId, group, 5000);
+        Console.WriteLine(content);
+        await Task.Delay(300000);
     }
+
+    internal class ConfigListener : IListener
+    {
+        public void ReceiveConfigInfo(string configInfo)
+        {
+            Console.WriteLine("receive:" + configInfo);
+        }
+    }
+}
+
+/*
+Refer to document:  https://github.com/nacos-group/nacos-sdk-csharp/tree/dev/samples/MsConfigApp
+Demo for ASP.NET Core Integration
+MsConfigApp.csproj
+
+<ItemGroup>
+  <PackageReference Include="nacos-sdk-csharp.Extensions.Configuration" Version="${latest.version}" />
+</ItemGroup>
+*/
+
+using Microsoft.AspNetCore.Hosting;
+using Microsoft.Extensions.Configuration;
+using Microsoft.Extensions.Hosting;
+using Serilog;
+using Serilog.Events;
+
+public class Program
+{
+    public static void Main(string[] args)
+    {
+        Log.Logger = new LoggerConfiguration()
+            .Enrich.FromLogContext()
+            .MinimumLevel.Override("Microsoft", LogEventLevel.Warning)
+            .MinimumLevel.Override("System", LogEventLevel.Warning)
+            .MinimumLevel.Debug()
+            .WriteTo.Console()
+            .CreateLogger();
+
+        try
+        {
+            Log.ForContext<Program>().Information("Application starting...");
+            CreateHostBuilder(args, Log.Logger).Build().Run();
+        }
+        catch (System.Exception ex)
+        {
+            Log.ForContext<Program>().Fatal(ex, "Application start-up failed!!");
+        }
+        finally
+        {
+            Log.CloseAndFlush();
+        }
+    }
+
+    public static IHostBuilder CreateHostBuilder(string[] args, Serilog.ILogger logger) =>
+        Host.CreateDefaultBuilder(args)
+            .ConfigureAppConfiguration((context, builder) =>
+            {
+                var c = builder.Build();
+                builder.AddNacosV2Configuration(c.GetSection("NacosConfig"), logAction: x => x.AddSerilog(logger));
+            })
+            .ConfigureWebHostDefaults(webBuilder =>
+            {
+                webBuilder.UseStartup<Startup>().UseUrls("http://*:8787");
+            })
+            .UseSerilog();
 }
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