feat: finish basic function of BMapSharp.

- fix weird C sharp behavior about calling FreeNativeData without calling ManagedToNative, which cause segment fault.
- disable unhandled exception handler in debug mode for BMap.
- change all associated code involving these issues.

BMapBindings/BMapSharp/BMapSharpTestbench/BMapSharpTestbench.csproj

@@ -1,5 +1,9 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
+  <ItemGroup>
+    <ProjectReference Include="..\BMapSharp\BMapSharp.csproj" />
+  </ItemGroup>
+
   <PropertyGroup>
     <OutputType>Exe</OutputType>
     <TargetFramework>net8.0</TargetFramework>

BMapBindings/BMapSharp/BMapSharpTestbench/Program.cs

@@ -1,12 +1,58 @@
 using System;
+using System.Text;
+
+namespace BMapSharpTestbench {
+    internal class Program {
+        static void Main(string[] args) {
+            // Check environment
+            Console.OutputEncoding = Encoding.UTF8;
+            if (!BMapSharp.BMapWrapper.Utils.IsBMapAvailable()) {
+                Console.WriteLine("Fail to initialize native BMap.");
+                Environment.Exit(0);
+            }
+
+            // Waiting debugger
+            int pid = System.Diagnostics.Process.GetCurrentProcess().Id;
+            Console.WriteLine($"C# PID is {pid}. Waiting debugger, press any key to continue...");
+            Console.ReadKey(true);
+
+            // Start testbench
+            string file_name = "Level_02.NMO";
+            string temp_folder = "Temp";
+            string texture_folder = "F:\\Ballance\\Ballance\\Textures";
+            string[] encodings = ["cp1252", "gb2312"];
+
+            using (var reader = new BMapSharp.BMapWrapper.BMFileReader(file_name, temp_folder, texture_folder, encodings)) {
+                Console.WriteLine("===== Groups =====");
+                foreach (var gp in reader.GetGroups()) {
+                    Console.WriteLine(gp.GetName());
+                }
+
+                Console.WriteLine("===== 3dObjects =====");
+                foreach (var obj in reader.Get3dObjects()) {
+                    Console.WriteLine(obj.GetName());
+                }
+
+                Console.WriteLine("===== Meshes =====");
+                foreach (var mesh in reader.GetMeshes()) {
+                    Console.WriteLine(mesh.GetName());
+                }
+
+                Console.WriteLine("===== Materials =====");
+                foreach (var mtl in reader.GetMaterials()) {
+                    Console.WriteLine(mtl.GetName());
+                }
+
+                Console.WriteLine("===== Textures =====");
+                foreach (var tex in reader.GetTextures()) {
+                    Console.WriteLine(tex.GetName());
+                }
+
+            }
+
+            Console.WriteLine("===== Done =====");
+            Console.ReadKey(true);
 
-namespace BMapSharpTestbench // Note: actual namespace depends on the project name.
-{
-    internal class Program
-    {
-        static void Main(string[] args)
-        {
-            Console.WriteLine("Hello World!");
         }
     }
 }