Enums 开始学习枚举，属性PTx

我是C语言的新手，现在我正在研究枚举，我在属性PTx上遇到了这个问题

错误1可访问性不一致：属性类型“EE5.Taxas”的可访问性不如属性“EE5.Deposito.PTx”33

我该怎么办

名称空间EE5 { 列举分类群 {A=20，B=24，C=30}

enum Limites 
{L1 = 2, L2 = 5 }

public class Deposito
{
    private double Capital;
    private int Time;
    private Taxas Tx;

    public Deposito(int C, double N)
    {
        Capital = C;
        Time = N;
        if (N < (int)Limites.L1)
            Tx = Taxas.A;
        else 
            if (N < (int)Limites.L2)
                Tx = Taxas.B;
            else
                Tx = Taxas.C;
    }

    public Taxas PTx
    {
        get
        {
            return Tx;
        }
    }

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公开你的分类单元

namespace EE5 { public enum Taxas { A = 20, B = 24, C = 30 }