如何用C#里面的winform窗体内的标签通过上一页和下一页的按钮进行切换？

本人小白，现在做一个软件，需要26个英文字母播放，但是，如果做成图片插入的话，文件总的加起来有点大，所以想用标签来回切换播放字母，另外，上一页和下一页怎么写？用图片有教程，可以做，但是用标签，我不会，百度了一天也没百度出来，请问大神，该怎么写？

String[] Contents = { "a", "b" ,"c","d","e", "f" ,"g","h", "i" ,"j","k", "l" ,"m","n", "o" ,"p","q", "r" ,"s" ,"t", "u" ,"v"，"w", "x" ,"y","z"};//存入26个字母
int currentIndex = 0;//设置初始显示为字母a
假设标签名字为LabelContent，在属性中设置其初值Text为a

上一页按钮假如设为BtnPrevious，其响应事件：

 private void BtnPrevious_Click(object sender, EventArgs e)
        {

            currentIndex -= 1;
            if (currentIndex < 0)
            {
                LabelContent.Text = Contents.GetValue(25).ToString();
                currentIndex = 25;
            }
            else
                LabelContent.Text = Contents.GetValue(currentIndex).ToString();
        }

下一页按钮假定为 BtnNext，其响应函数为

 private void BtnNext_Click(object sender, EventArgs e)
        {

            currentIndex += 1;
            if (currentIndex > 25)
            {
                LabelContent.Text = Contents.GetValue(0).ToString();
                currentIndex = 0;
            }
            else
                LabelContent.Text = Contents.GetValue(currentIndex ).ToString();
        }

做多个panel，每个装入一个页的内容，上一页下一页就将对应的panel调用BringToFront

namespace Test
{
public partial class Form1 : Form
{
private int Postion;
public Form1()
{
InitializeComponent();
}

    private void Form1_Load(object sender, EventArgs e)
    {
        Postion = 65;
        this.LB_SHOW.Text = ((char)Postion).ToString();
    }

    private void BTN_SUB_Click(object sender, EventArgs e)
    {
        if (Postion<=65)
        {
            Postion = 65 + 25;
        }
        else
        {
            Postion--;
        }
        this.LB_SHOW.Text = ((char)Postion).ToString();
    }

    private void BTN_ADD_Click(object sender, EventArgs e)
    {
        if (Postion >= 65+25)
        {
            Postion = 65 ;
        }
        else
        {
            Postion++;
        }
        this.LB_SHOW.Text = ((char)Postion).ToString();
    }
}

}