how can i make a previous button here?

So i am making a game in visual c#...the first stage is looking through the photos that are shown in a picturebox. I have written this code so far:

namespace FaceNameGame
{
    public partial class LevelOnePartOne : Form
    {
       
        int m , piccount=0, k;
        Random rd = new Random();
        public string[] picturenames= new string[4];
        public string[] links = new string[3];
        string sourcePath = @"C:\Users\Marina\Desktop\FaceNameGame\images";
        string targetPath = @"C:\Users\Marina\Desktop\FaceNameGame\images\used";
        bool directoryexists = false;
        string[] files = Directory.GetFiles(@"C:\Users\Marina\Desktop\FaceNameGame\images\", "*.jpg", SearchOption.AllDirectories);

        public LevelOnePartOne()
        {
            InitializeComponent();
        }



        private void LevelOnePartOne_Load(object sender, EventArgs e)
        {


            ProceedBtn.Hide();
           
            PreviousBtn.Hide();

           
           

            if (!System.IO.Directory.Exists(targetPath))
            {
                System.IO.Directory.CreateDirectory(targetPath);
                directoryexists = true;

            }

            Random rand = new Random();
            string[] files = Directory.GetFiles(@"C:\Users\Marina\Desktop\FaceNameGame\images\", "*.jpg", SearchOption.AllDirectories);


             for (m = 0; m < 3; m++)
            {

               Loop:
                picturenames[m] = files[rand.Next(files.Length)];
                string name1 = picturenames[m].ToString();
                string name2 = name1.Substring(name1.LastIndexOf("\\"));
                string name3 = name2.Remove(name2.Length - 4, 4);
                string name = name3.Remove(0, 1);
                string filename = name2.TrimStart('\\');
               
               
               
                if (!IsDirectoryEmpty(targetPath))
                {


                    if (File.Exists("C:\\Users\\Marina\\Desktop\\FaceNameGame\\images\\used\\" + filename))
                    {

                        goto Loop;  
                       
                     

                    }

                }

                string sourceFile = System.IO.Path.Combine(sourcePath, filename);
                string destFile = System.IO.Path.Combine(targetPath, filename);

               

                System.IO.File.Copy(sourceFile, destFile, true);
               
            }


           

            ShowCurrentImage(0);
                k = 1;


        }

           

           
       

        private void NextBtn_Click(object sender, EventArgs e)
        {
            piccount++;

            if(piccount < 3)
            {

                if (k<3)
                {
                   
                    ShowCurrentImage(k);
                    k++;
                   
                }
               
            }    
           
            if (piccount == 2)
            {
                NextBtn.Hide();
                ProceedBtn.Show();
            }

            if (k > 0)
            {
                PreviousBtn.Show();
            }

        }

        private void pictureBox1_Click(object sender, EventArgs e)
        {


        }

        private void PhotoTemplatePicBx_Click(object sender, EventArgs e)
        {

        }

        private void ProceedBtn_Click(object sender, EventArgs e)
        {
            LevelOnePartTwo lvltwoprttwo = new LevelOnePartTwo();
            this.Hide();
            lvltwoprttwo.Show();
        }

        protected override bool ProcessCmdKey(ref Message msg, Keys keyData)
        {
            if (keyData == Keys.Escape)
            {
                this.Close();

                if (directoryexists)
                {
                    Directory.Delete(targetPath, true);
                }
                return true;
            }
            return base.ProcessCmdKey(ref msg, keyData);
        }

        private void PreviousBtn_Click(object sender, EventArgs e)
        {
           

                if (k > 0 && k < 3)
                {

                    ShowCurrentImage(k);
                    k--;

                }

           

           

        }

        protected void ShowCurrentImage(int picindex)
        {

            string[] filestouse = Directory.GetFiles(@"C:\Users\Marina\Desktop\FaceNameGame\images\used\", "*.jpg", SearchOption.AllDirectories);
            pictureBox1.Load(filestouse[picindex]);
            string nameused1 = pictureBox1.ImageLocation.ToString();
            string nameused2 = nameused1.Substring(nameused1.LastIndexOf("\\"));
            string nameused3 = nameused2.Remove(nameused2.Length - 4, 4);
            string nameused = nameused3.Remove(0, 1);
            namelbl.Text = "Hello,my name is" + " " + nameused;
               

           
        }


        public bool IsDirectoryEmpty(string path)
        {
            string[] dirs = Directory.GetDirectories(path); string[] files = System.IO.Directory.GetFiles(path);
            return dirs.Length == 0 && files.Length == 0;
        }

    }
}



everything works fine except the previous button...any ideas on how i can do it? Thanks in advance for you help...
Marina KOpen Source developerAsked:
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Prakash SamariyaIT ProfessionalCommented:
try below code! please check value of "k"
private void PreviousBtn_Click(object sender, EventArgs e)
{
            if (k > 0 && k < 3)
            {
                    k--;
                    ShowCurrentImage(k);
            }
            if (k <=0)
            {
                PreviousBtn.Hide();
            }
}

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Prakash SamariyaIT ProfessionalCommented:
@Marina K, Did you find the resolution?

Hope you might got some help from my answer!!
Marina KOpen Source developerAuthor Commented:
I figured it out now. This answer helped me very much. Thank you
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