You don't dispose Preview.Image before changing it, Try this:
public void GetImageData(string BitmapName, TextBox ImageName, TextBox ImageCreated, TextBox Size, TextBox Width, TextBox Height, TextBox HResolution, TextBox VResolution, TextBox Type, PictureBox Preview)
{
try
{
FileInfo fileinfo = new FileInfo(BitmapName);
ImageName.Text = fileinfo.Name;
ImageCreated.Text = fileinfo.CreationTime.ToString();
Size.Text = (fileinfo.Length / 1024).ToString() + " Kilobytes";
Image image = Image.FromFile(BitmapName);
using (Bitmap Bit = new Bitmap(image))
{
Height.Text = Bit.Height.ToString() + " px";
Width.Text = Bit.Width.ToString() + " px";
HResolution.Text = Bit.HorizontalResolution.ToString() + " dpi";
VResolution.Text = Bit.VerticalResolution.ToString() + " dpi";
if (fileinfo.Extension == ".bmp" || fileinfo.Extension == ".BMP")
{
Type.Text = "Bitmap Image";
}
else if (fileinfo.Extension == ".jpeg" || fileinfo.Extension == ".JPEG")
{
Type.Text = "Jpeg Image";
}
else if (fileinfo.Extension == ".jpg" || fileinfo.Extension == ".JPG")
{
Type.Text = "Jpg Image";
}
else if (fileinfo.Extension == ".png" || fileinfo.Extension == ".PNG")
{
Type.Text = "Png Image";
}
else if (fileinfo.Extension == ".gif" || fileinfo.Extension == ".GIF")
{
Type.Text = "GIF Image";
}
if (Preview.Image != null)
Preview.Image.Dispose();
Preview.Image = image;
}
}
catch (OutOfMemoryException)
{
Preview.Image = Properties.Resources.InvalidImage;
}
}