未处理类型异常(System.TypeInitializationException)

正如标题所说，Visual Studio在执行程序时抛出异常。确切的错误:

An unhandled exception of type 'System.TypeInitializationException' occurred in mscorlib.dll

由于我对使用Visual Studio和c#相当陌生，因此我无法辨别问题是什么。我用谷歌搜索了一下，但没有任何信息能帮助我恢复这个异常程序。

程序代码:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.IO;

namespace Game {
    public struct entity {
        int XP,
            HP,
            mana,
            luck,
            strength,
            defense;
        float modStrength,
            modDefense;
        string stance;
    }
    public class Game {
        private  entity enemy;
        private static Dictionary<string, int> playerData =
            new Dictionary<string, int>();
         public static string[] entityPool =
            new StreamReader(Properties.Resources.Entities).ToString().Split('?');
        static void Main (string[] args) {
            instancePlayer();
            Console.ReadKey();
        }   
        private static void instancePlayer () {
            string[] playerDataDummy = entityPool[0].Trim().Split(';');
            foreach (string s in playerDataDummy) {
                string[] indivArr = s.Split(' ');
                playerData.Add(indivArr[0], Convert.ToInt16(indivArr[1]));
            }
            foreach (KeyValuePair<string, int> s in playerData) {
                Console.WriteLine("[{0}] {1}", s.Key, s.Value);
            }
        }
        private void instanceEnemy () {
        }
    }
}

我已经能够将问题缩小到这一行，尽管…

public static string[] entityPool = new StreamReader(Properties.Resources.Entities).ToString().Split('?');

这是我所发现的最多的;删除它的初始化，以及它的所有引用，将使问题无效。但是，唉，我确实需要它。

public static string[] entityPool = new StreamReader(Properties.Resources.Entities).ToString().Split('?');

StreamReader sr = new StreamReader(Properties.Resources.Entities);
string[] entityPool = sr.ReadToEnd().Split('?');