c#高级编程 里面的例子怎么不对啊？
using System;
using System.Collections.Generic;
using System.Text;
using System.Drawing;


namespace ConsoleApplication1
{
public class UserPrefernces
{
public static readonly Color BackColor;

static UserPreferences()
{
DateTime now=DateTime.Now;
if(now.DayOfWeek==DayOfWeek.Saturday||now.DayOfWeek==DayOfWeek.Sunday)
BackColor=Color.Green;
else
BackColor=Color.Red;
}

private UserPreferences()
{
}
}

class MainEntryPoint

{

static void Main(string[] args)
{
Console.WriteLine( "User-Preferences: BackColor is: "+UserPrefernces.BackColor.ToString());
}
}
}

我这都是照着书写的，但是编译提示说
“类、结构或接口方法必须有返回类型”
无法编译啊，怎么回事？？？

[解决办法]
拼写错误
你的类名是 UserPrefernces
而构造函数名是 UserPreferences