I am trying to convert a group of images in a folder to animated gif and facing error "Cannot access a closed Stream.".Also there must be error in display image as lable..

protected void Button1_Click(object sender, EventArgs e) {
    //Variable declaration
    MemoryStream memoryStream; 
 
    binaryWriter = new BinaryWriter(stream); 
 
   int numFiles = fileEntries.Length;
    for (int picCount = 0; picCount < numFiles; picCount++)
    {
        image = System.Drawing.Image.FromFile(fileEntries[picCount]);
 
         image.Save(memoryStream, ImageFormat.Gif);
                buf1 = memoryStream.ToArray();
 
                memoryStream.SetLength(0); 
 
    }
    binaryWriter.Close();
    System.Drawing.Image streamGIF = System.Drawing.Image.FromStream(stream);
   Label1.Text += "<img src=" + streamGIF + " /><br />";
}