没有合适的方法可以覆盖

Question

我尝试了多种方法来获取此值以返回项目的这些值，但是无论如何，我都会不断遇到这些问题。请帮助

using System;
using System.Collections.Generic;

namespace MpaintV2.Customer
{
    public class Trade : Utilities.Helper
    {
        //public static List<String> TradeFiles(String TradeName, String TradeAddress, String TradePhone, Double PaintCoverage = 0.0)
        //{       

        public override string ToString(String TradeName, String TradeAddress, String TradePhone, String TradeShape, double PaintCoverage)
        {
            List<string> FileData = Utilities.Helper.get_file_data();

            for (int counter = 0; counter < FileData.Count; counter++)
            {
                String[] SplitRecord = FileData[counter].Split(',');

                if (SplitRecord[0].Equals("Trade"))
                {
                    TradeName = SplitRecord[1];
                    TradeAddress = SplitRecord[2];
                    TradePhone = SplitRecord[3];
                    PaintCoverage = (double.Parse(SplitRecord[4]) / 10.00);                
                }
                //Console.WriteLine(" " + TradeName + " " + TradeAddress + " " + TradePhone + " " + PaintCoverage + "Paints");
            }

            return TradeName + TradeAddress + TradePhone + TradeShape + PaintCoverage;
        }  
    }
}