方法无过载.我做错了什么

方法没有重载。我做错了什么？我的头疼:)

//this is the first class named Employee
namespace lala
{
public class Employee
{
    public static double GrossPay(double WeeklySales) //grosspay
    {
        return WeeklySales * .07;
    }
    public static double FedTaxPaid(double GrossPay)
    {
        return GrossPay * .18;
    }
    public static double RetirementPaid(double GrossPay)
    {
        return GrossPay * .1;
    }
    public static double SocSecPaid(double GrossPay)
    {
        return GrossPay * .06;
    }
    public static double TotalDeductions(double SocSecPaid, double RetirementPaid, double FedTaxPaid)
    {
        return SocSecPaid + RetirementPaid + FedTaxPaid;
    }
    public static double TakeHomePay(double GrossPay, double TotalDeductions)
    {
        return GrossPay - TotalDeductions;
    }
}

}

这是名为 EmployeeApp 的第二个类这就是我不知道为什么我的程序不起作用的地方

namespace lala
{
public class EmployeeApp
{
    public static string name;
    public static double WeeklySales;
    public static void Main()
    {
        Employee yuki = new Employee();
        GetInfo();
        Console.WriteLine();
        Console.WriteLine("Name: {0}", name);
        Console.WriteLine();
        Console.WriteLine("Gross Pay            : {0}", yuki.GrossPay());
        Console.WriteLine("Federal Tax Paid     : {0}", yuki.FedTaxPaid());
        Console.WriteLine("Social Security Paid : {0}", yuki.SocSecPaid());
        Console.WriteLine("Retirement Paid      : {0}", yuki.RetirementPaid());
        Console.WriteLine("Total Deductions     : {0}", yuki.TotalDeductions());
        Console.WriteLine();
        Console.WriteLine("Take-Home Pay        : {0}", yuki.TakeHomePay());
        Console.ReadKey();
    }
    public static string GetInfo()
    {
        Console.Write("Enter Employee Name : ");
        name = Console.ReadLine();
        Console.Write("Enter your Weekly Sales : ");
        WeeklySales = Convert.ToDouble(Console.ReadLine());
        return name;
    }
}

}

任何帮助将不胜感激:)