使用EmguCV导入视频时出现TypeInitializationException trown

我正在进行一个项目，希望用户能够导入视频。每次，当我选择要导入的视频时，public class CvString : UnmanagedObject都会向我抛出System.TypeInitializationException错误。这不取决于数据类型，它不适用于图片，如.jpeg或.png，也不适用于我尝试过的任何视频格式（.avi``.mp4``.wmp）

这是我想要加载和显示视频（自己编写的代码）的片段

OpenFileDialog ofd = new OpenFileDialog();
Capture _capture;
Timer My_Time = new Timer();
int FPS = 30;
public Form1()
{
    InitializeComponent();
    //Frame Rate
    My_Time.Interval = 1000 / FPS;
    My_Time.Tick += new EventHandler(timer1_Tick);
    My_Time.Start();
    _capture = new Capture("20151102_110553.mp4");
}
private void timer1_Tick(object sender, EventArgs e)
{
    imageBox1.Image = _capture.QueryFrame();
}

private void openFileDialog1_FileOk(object sender, CancelEventArgs e)
{
    _capture = new Capture(openFileDialog1.FileName.ToString());
}
private void button2_Click(object sender, EventArgs e)//Import-Button
{
     openFileDialog1.ShowDialog();
}

这里是抛出异常的方法（代码来自Emgu.CV）

namespace Emgu.CV
{
   public class CvString : UnmanagedObject
   { 
        private bool _needDispose;
        internal CvString(IntPtr ptr, bool needDispose)
        {
             _ptr = ptr;
             _needDispose = needDispose;
        }
        public CvString(String s)
        {
        if (s == null)
            {
                _ptr = CvInvoke.cveStringCreate();
            }
        else
        {
            byte[] bytes = Encoding.UTF8.GetBytes(s);
            Array.Resize(ref bytes, bytes.Length + 1);
            bytes[bytes.Length - 1] = 0; //The end of string ''0' character
            GCHandle handle = GCHandle.Alloc(bytes, GCHandleType.Pinned);
            _ptr =CvInvoke.cveStringCreateFromStr(handle.AddrOfPinnedObject());
            // ^ Exception is thrown ^
            handle.Free();
        }
        _needDispose = true;
    }

我已经尝试将视频或图片导入到我的项目中，在启动项目时直接导入，或者在运行时使用OpenFileDialog选择文件，但结果相同。一旦我选择了一个文件并想将其加载到我的项目中，就会抛出Exception。

编辑：添加堆栈跟踪

堆栈跟踪

No suitable directory found to load unmanaged modules
Exception thrown : "System.DllNotFoundException" in Emgu.CV.dll
Exception thrown : "System.TypeInitializationException" in Emgu.CV.dll
Thread 0xa64 ended with Code 0 (0x0).
Exception thrown : "System.TypeInitializationException" in Emgu.CV.dll
Exception thrown : "System.TypeInitializationException" in Emgu.CV.dll
Exception thrown : "System.TypeInitializationException" in Emgu.CV.dll