The type initializer for 'MyClass' threw an exception

using System;
using System.Collections.Generic;
using System.IO;
using System.Reflection;
using System.Resources;
using System.Text;
 
namespace Test_v1._0
{
    class TestInfo
    {
        public static bool FullScreen = false;
        public static bool ShowAll = false;
        public static string Title = null;
        public static string Separator = null;
 
        public static class QA
        {
            public static void AddQuestion(int QuestionID, string Question)
            {
                IResourceWriter RW = new ResourceWriter("Resources.Strings");
                RW.AddResource("Question_" + QuestionID.ToString(), Question);
                RW.Close();
            }
 
            public static string GetQuestion(int QuestionID)
            {
                return Properties.Resources.ResourceManager.GetString("Question_" + QuestionID.ToString());
            }
 
            public static void AddAnswer(int QuestionID, int AnswerID, bool Correct, string Answer)
            {
                IResourceWriter RW = new ResourceWriter("Resources.Strings");
                RW.AddResource("Question_" + QuestionID.ToString() + "_Answer_" + AnswerID.ToString(), Correct.ToString() + Separator + Answer);
                RW.Close();
            }
 
            public static string GetAnswer(int QuestionID, int AnswerID)
            {
                return Properties.Resources.ResourceManager.GetString("Question_" + QuestionID.ToString() + "-Answer-" + AnswerID.ToString());
            }
        }
    }
}

MessageBox.Show(TestInfo.QA.GetQuestion(1));