diff --git a/src/DotRecast.Recast.Demo/DemoLog.cs b/src/DotRecast.Recast.Demo/DemoLog.cs
new file mode 100644
index 0000000..29c4b3a
--- /dev/null
+++ b/src/DotRecast.Recast.Demo/DemoLog.cs
@@ -0,0 +1,27 @@
+using System.Collections.Generic;
+using System.Runtime.CompilerServices;
+using Serilog;
+using Silk.NET.OpenGL;
+
+namespace DotRecast.Recast.Demo;
+
+public static class DemoLog
+{
+    private static readonly ILogger Logger = Log.ForContext(typeof(DemoLog));
+    private static HashSet<string> messages = new();
+    
+    public static void LogIfGlError(GL gl, [CallerMemberName] string method = "", [CallerFilePath] string file = "", [CallerLineNumber] int line = 0)
+    {
+        var err = gl.GetError();
+        if (err == GLEnum.NoError)
+            return;
+
+        var s = $"{method}() err({err}) in {file}:{line}";
+        if (messages.Contains(s))
+            return;
+        
+        messages.Add(s);
+        Logger.Error(s);
+    }
+
+}
\ No newline at end of file
diff --git a/src/DotRecast.Recast.Demo/DotRecast.Recast.Demo.csproj b/src/DotRecast.Recast.Demo/DotRecast.Recast.Demo.csproj
index d9f1dc7..f29a100 100644
--- a/src/DotRecast.Recast.Demo/DotRecast.Recast.Demo.csproj
+++ b/src/DotRecast.Recast.Demo/DotRecast.Recast.Demo.csproj
@@ -8,7 +8,10 @@
 
     <ItemGroup>
         <PackageReference Include="Serilog" Version="2.12.0" />
+        <PackageReference Include="Serilog.Enrichers.Environment" Version="2.2.0" />
+        <PackageReference Include="Serilog.Enrichers.Thread" Version="3.1.0" />
         <PackageReference Include="Serilog.Sinks.Console" Version="4.1.0" />
+        <PackageReference Include="Serilog.Sinks.RollingFile" Version="3.3.0" />
         <PackageReference Include="Silk.NET" Version="2.16.0" />
         <PackageReference Include="Silk.NET.OpenGL.Extensions.ImGui" Version="2.16.0" />
     </ItemGroup>
diff --git a/src/DotRecast.Recast.Demo/Program.cs b/src/DotRecast.Recast.Demo/Program.cs
index 5d066e1..a3d3a19 100644
--- a/src/DotRecast.Recast.Demo/Program.cs
+++ b/src/DotRecast.Recast.Demo/Program.cs
@@ -8,10 +8,6 @@ public static class Program
 {
     public static void Main(string[] args)
     {
-        Log.Logger = new LoggerConfiguration()
-            .WriteTo.Console()
-            .MinimumLevel.Verbose()
-            .CreateLogger();
         
         var path = Loader.ToRPath("dungeon.obj");
         path = Path.GetDirectoryName(path);
@@ -22,6 +18,16 @@ public static class Program
             Directory.SetCurrentDirectory(workingDirectory);
         }
 
+        Log.Logger = new LoggerConfiguration()
+            .Enrich.WithThreadId()
+            //.Enrich.WithExceptionDetails()
+            .Enrich.FromLogContext()
+            //.Enrich.WithMethodFullName()
+            .MinimumLevel.Verbose()
+            .WriteTo.File("logs/log.txt")
+            .WriteTo.Console()
+            .CreateLogger();
+        
         var demo = new RecastDemo();
         demo.start();
     }