谁能帮我看看这段C#代码？ 并说明一下意思...

Question

这是一个皮肤控件的代码如下:

private void timer1_Tick(object sender, EventArgs e)
{
this.count = this.count + 1;
if (this.count >= 3) { this.count = 0; }
hsttextbox1.Text = (this.count).ToString("#0");
switch (this.count)
{
case 0:
this.skinEngine1.SerialNumber = "";
this.skinEngine1.SkinFile = @"Calmness.ssk";
//this.skinEngine1.SkinStreamMain = ((System.IO.Stream)(resources.GetObject("skinEngine1.SkinStreamMain")));
//@"database\data"
break;
case 1:
//this.Close();
this.skinEngine1.SerialNumber = "";
this.skinEngine1.SkinFile = @"CalmnessColor1.ssk";
//this.skinEngine1.SkinStreamMain = ((System.IO.Stream)(resources.GetObject("skinEngine1.SkinStreamMain")));
new Form1();
break;
case 2:
this.skinEngine1.SerialNumber = "";
this.skinEngine1.SkinFile = @"CalmnessColor2.ssk";
//this.skinEngine1.SkinStreamMain = ((System.IO.Stream)(resources.GetObject("skinEngine1.SkinStreamMain")));
new Form1();
break;
case 3:
this.skinEngine1.SerialNumber = "";
this.skinEngine1.SkinFile = @"DeepCyan.ssk";

请问这些代表什么意思?

this.count = this.count + 1;
if (this.count >= 3) { this.count = 0; }
hsttextbox1.Text = (this.count).ToString("#0");

还有这些代表什么意思!
this.skinEngine1.SerialNumber = "";
this.skinEngine1.SkinFile = @"Calmness.ssk";

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在此非常感谢你们的答复.!

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Answer 1

this.count = this.count + 1;
if (this.count >= 3) { this.count = 0; }
一共有4种更换的皮肤，计时器到3的时候又重新从0开始

this.skinEngine1.SkinFile = @"Calmness.ssk";
是保存这个皮肤的文件

Answer 2

没看懂