C# winform 单击按钮防止多次实例化

一个单击按钮，希望list中值可以多次添加，但每次单击都会重新实例化，导致只能访问mlist[0]，而之后每次单击记录都在mlist【0】中，我希望实现第二次单击保存到mlist【1】中去
List<ImageListshow> mlist=new List<ImageListshow>();
ImageListshow show1 = new ImageListshow();
//show1.path = Connection.ConnectionPicture();
show1.path = Image.FromFile(Connection.ConnectionPicture());
show1.save = true;
mlist.Add(show1);
//pictureBox_get1.Image= mlist[0].path;
string pictureBox = "pictureBox_get";
pictureBox = pictureBox + i;
PictureBox pb1 = (PictureBox)this.Controls.Find(pictureBox, true)[0];
pb1.Image = mlist[0].path;

把这一行
List<ImageListshow> mlist=new List<ImageListshow>();


不要放在按钮单击事件里，挪到外面去就行了
也就是形如
List<ImageListshow> mlist=new List<ImageListshow>();
private void Button1_click(object sender,EventArgs e)  //这是你的单击
{  
  ImageListshow show1 = new ImageListshow();
  //show1.path = Connection.ConnectionPicture();
  show1.path = Image.FromFile(Connection.ConnectionPicture());
  show1.save = true;
  mlist.Add(show1);
  //pictureBox_get1.Image= mlist[0].path;
  string pictureBox = "pictureBox_get";
  pictureBox = pictureBox + i;
  PictureBox pb1 = (PictureBox)this.Controls.Find(pictureBox, true)[0];
  pb1.Image = mlist[0].path;//我不e5a48de588b67a686964616f31333332643237太清楚你的用意，也行这里应该是pb.Image=mlist[mlist.Count-1].path;
}

list and imagelist 可以是个整体，list item 中应该有image 这个属性事事整体弄

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