How Do I Save Images On C# Project Folder Using Buttonclick Not Dialogboxes?

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C#

Hello People,

i'm developing a software which i can open images and it will give a preview of that image as well as you can save that image to c# project refferance folder by click another button called button

so basically i'm using openfiledialog for preview picture and browse.
but i don't need savefiledialog for save. because i just need to click the button and save it in the project folder, provide a message.

private void BrwseBtn_Click(object sender, EventArgs e)
       {
           openFileDialog1 = new OpenFileDialog();

           openFileDialog1.InitialDirectory = "c:\\";
           openFileDialog1.Filter = "All files (*.*)|*.*";
           openFileDialog1.FilterIndex = 2;
           openFileDialog1.RestoreDirectory = true;

           if (openFileDialog1.ShowDialog() == DialogResult.OK)
           {
               try
               {
                   //PictureBox PictureBox1 = new PictureBox();
                   pictureBox1.Image = new Bitmap(openFileDialog1.FileName);
                   //file preview
                   this.Controls.Add(pictureBox1);
               }
               catch (Exception ex)
               {
                   MessageBox.Show("Error loading image" + ex.Message);
               }
           }
       }

private void UploadBtn_Click(object sender, EventArgs e)
        {
         // trying to save the file in C:\ drive
            string fileName = @"C:\\";

            this.UploadBtn.Image.Save(fileName);
            MessageBox.Show("Success");
            // let say i need to save not only image, i need to save images and docs as well
        }