C# RLNET/OPENTK System.MissingMethodException 在运行时间内

Question

我正在尝试使用 RLNET 库在 c# 中制作一个小型 2d 游戏。 RLNET 库依赖 OpenTK，因此我使用 Visual Studio 中的 NuGet 包管理器将 RLNET 和 OpenTK 的最新版本添加到我的项目中。我正在阅读一个解释如何使用这些库的教程。但是，当我运行将代码运行放入运行时的 MissingMethodException 中。

我正在学习的教程在这里：https://roguesharp.wordpress.com/2016/03/02/roguesharp-v3-tutorial-creating-the-project/

解决方案资源管理器在“引用”下拉列表下显示项目中包含的两个库。我还将它们包含在我的代码中：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using RLNET;
using OpenTK;

namespace Rouge_Game
{
    class Program
    {
        private static readonly int _screenWidth = 100;
        private static readonly int _screenHeight = 70;

        private static RLRootConsole _rootConsole;

        static void Main(string[] args)
        {
            // This must be the exact name of the bitmap font file we are using or it will error.
            string fontFileName = "terminal8x8.png";
            // The title will appear at the top of the console window
            string consoleTitle = "RougeSharp V3 Tutorial - Level 1";
            // Tell RLNet to use the bitmap font that we specified and that each tile is 8 x 8 pixels
            _rootConsole = new RLRootConsole(fontFileName, _screenWidth, _screenHeight,
          8, 8, 1f, consoleTitle);
            // Set up a handler for RLNET's Update event
            _rootConsole.Update += OnRootConsoleUpdate;
            // Set up a handler for RLNET's Render event
            _rootConsole.Render += OnRootConsoleRender;
            // Begin RLNET's game loop
            _rootConsole.Run();
        }

        // Event handler for RLNET's Update event
        private static void OnRootConsoleUpdate(object sender, UpdateEventArgs e)
        {
            _rootConsole.Print(10, 10, "It worked!", RLColor.White);
        }

        // Event handler for RLNET's Render event
        private static void OnRootConsoleRender(object sender, UpdateEventArgs e)
        {
            // Tell RLNET to draw the console that we set
            _rootConsole.Draw();
        }
    }
}

代码中有运行时间错误的部分是这样的：

    // Event handler for RLNET's Render event
        private static void OnRootConsoleRender(object sender, UpdateEventArgs e)
        {
            // Tell RLNET to draw the console that we set
            _rootConsole.Draw();
        }

当我运行项目编译时没有错误并且程序启动，但随后抛出此异常：

System.MissingMethodException
  HResult=0x80131513
  Message=Method not found: 'Void 
OpenTK.Graphics.OpenGL.GL.BlendFunc(OpenTK.Graphics.OpenGL.BlendingFactorSrc, OpenTK.Graphics.OpenGL.BlendingFactorDest)'.
  Source=RLNET
  StackTrace:
   at RLNET.RLRootConsole.Draw()
   at Rouge_Game.Program.OnRootConsoleRender(Object sender, UpdateEventArgs e) in C:\Users\pjmul\source\repos\Rouge Game\Rouge Game\Program.cs:line 45
   at RLNET.RLRootConsole.window_RenderFrame(Object sender, FrameEventArgs e)
   at System.EventHandler`1.Invoke(Object sender, TEventArgs e)
   at OpenTK.GameWindow.OnRenderFrame(FrameEventArgs e)
   at OpenTK.GameWindow.RaiseRenderFrame(Double elapsed, Double& timestamp)
   at OpenTK.GameWindow.DispatchRenderFrame()
   at OpenTK.GameWindow.Run(Double updates_per_second, Double frames_per_second)
   at OpenTK.GameWindow.Run(Double updateRate)
   at RLNET.RLRootConsole.Run(Double fps)
   at Rouge_Game.Program.Main(String[] args) in 
C:\Users\pjmul\source\repos\Rouge Game\Rouge Game\Program.cs:line 32

我不明白这个错误，但是当我使用 Visual Studio 中内置的对象查看器时，我可以在打开 OpenTK.dll 时找到 "missing" 函数。非常感谢任何关于如何修复此错误的建议。我还要感谢任何花时间提前帮助我的人。

Answer 1

OpenTK 的 3.x 分支有问题。尝试将您的 OpenTK 软件包降级回 2.x，它会起作用。

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