为什么我得到“方法必须有一个返回类型”

所以，今天下午我开始尝试学习c#。我一直在玩辐射避难所，我很想制作我自己的居民荒地探索部分的碳副本，然后我最终可以调整和扩展。

我有Program.cs, Speech.cs和Events.cs

program.cs调用speech.cs每个"回合"显示随机的句子。然后它意味着调用events.cs来确定每个"回合"的事件类型。

问题是我似乎不能得到事件方法的工作。它一直在说方法必须有一个返回类型

Speech方法似乎工作得很好，但是，回顾它，我不认为我真的理解我做了什么。

如有任何帮助，不胜感激。

下面的代码。

Program.cs

    using System;
namespace Roaming
{
    class MainClass
    {
        public static void Main (string[] args)
        {
            //Declare Variables
            int milliseconds = 1000;
            int currenthp = 100;
            int maxhp = 100;
            string eventGet;
            do {
                Console.WriteLine("Your HP is at {0}/{1} 'n", currenthp, maxhp);
                Random random = new Random();
                int randomNumber = random.Next(0,100);//Random roll do determine event
                if(randomNumber > 50)
                {
                    Roaming.typeOfEvent();
                }
                else
                {
                    Console.WriteLine ( Speech.GetRandom() );//Random Speech
                }
                System.Threading.Thread.Sleep (milliseconds);//Timer Delay
                Console.Clear();
            } while(currenthp > 0);
        }
    }
}

Speech.cs

    using System;
using System.Collections.Generic;
namespace Roaming
{
    public class Speech
    {
        private static readonly List<string> sentences = new List<string>() 
        {
            "It's so cold out here.",
            "I don't know where to go.",
            "Is that a finger?",
            "I have a pain in my Stomach.",
            "I'm sure I saw something move.",
            "Saw a Guard Dog, watching the area.",
            "I'm bleeding a little.",
            "I feel a little faint.",
            "I should have brought a book.",
            "How are things back at base I wonder.",
            "I wonder what's over there.",
            "I want to head back soon.",
            "Theres a lot of noise coming from over there.",
            "I think there's the remnants of what was once a village over there.",
            "Are Feral Ghouls real?",
            "Theres something wirtten in the wall ehre but I can't make it out.",
            "I can see a RadScorpion",
            "I think I'm lost.",
            "I wonder if the radiation has created Zombies.",
            "I am so hungry.",
            "Anyone nearby could probably hear my stomach rumbling.",
            "Ooh, that was a good fart.",
            "Could really do with some water.",
            "There's something strange moving in the sky."
        };
        private static readonly Random rangomGenerator = new Random();
        public static string GetRandom() 
        {
            int max = sentences.Count-1;
            int randomNumber = rangomGenerator.Next(max);
            return sentences[randomNumber];
        }

    }
}

Events.cs

    using System;
using System.Collections.Generic;
namespace Roaming
{
    public class eventType
    {
        public static typeOfEvent(string eventGet)
        {
            //Determining the type of event 
            Random random = new Random();
            int randomNumber = random.Next(0,100);//Random roll do determine event 
            if(randomNumber > 95) 
            { 
                Console.WriteLine("Find Weapon.");
            } 
            else if(randomNumber > 90) 
            { 
                Console.WriteLine("You found a stimpak");
            } 
            else if(randomNumber > 70) 
            { 
                Console.WriteLine("You were attacked"); 
            } 
            else 
            { 
                Console.WriteLine("You continue to explore"); 
            }
        }
    }
}

public static void typeOfEvent(string eventGet)