请教.net winform高手

我是.net新手，做了一个project，用了很多form，没用MDI form。就是希望从一个form，点击一个button，打开另外一个，但是关掉原来那个。我是button click里是这么做的：

using (SGeneric generic = new SGeneric())
{
//generic.Dock = DockStyle.Fill;
generic.Location = this.Location;
generic.ClientSize = new Size(this.ClientSize.Width, this.ClientSize.Height);
generic.ShowDialog();
}
this.Close();

可是发现每次点击都会建一个新的instance，memory一直在涨。不知道怎样才能解决这个问题？我用的是.net 2.0。

请各位给点建议，多谢多谢！

所有跟帖： 

• come here... -HappyNow?!- ♂ (187 bytes) () 10/21/2009 postreply 14:06:59

• 回复：come here... -相逢是缘- ♀ (22 bytes) () 10/21/2009 postreply 20:57:05

• just wild guess...... -撅着挺好- ♂ (1068 bytes) () 10/21/2009 postreply 17:16:11

• 咦~~, .net怎么看着象VBA呢? -小谋- ♀ (0 bytes) () 10/21/2009 postreply 19:30:09

• some .net role need to do VBA. i'm not familiar with it. -撅着挺好- ♂ (0 bytes) () 10/21/2009 postreply 19:58:49

• 回复：just wild guess...... -相逢是缘- ♀ (539 bytes) () 10/21/2009 postreply 20:54:39

• i might misunderstood u..... -撅着挺好- ♂ (361 bytes) () 10/21/2009 postreply 21:43:09

• 回复：i might misunderstood u..... -相逢是缘- ♀ (423 bytes) () 10/21/2009 postreply 23:00:29