public int CompareTo(object obj)
{
HinhChuNhat hcnSS = (HinhChuNhat)obj;
double dt = this.DienTich();
double dtSS = hcnSS.DienTich();
int kqSS = dt.CompareTo(dtSS);
return(kqSS);
}
protected void btnTinh_Click(object sender, EventArgs e)
{
HinhChuNhat hcn = new HinhChuNhat();
hcn.ChieuDai = double.Parse(txtChieuDai.Text);
hcn.ChieuRong = double.Parse(txtChieuRong.Text);
string dvt = ((char)178).ToString();
double dientich = hcn.DienTich();
txtDienTich.Text = string.Format("{0}{1}", dientich.ToString("#,##0"), dvt);
}
protected void btnTinh_Click(object sender, EventArgs e)
{
double dai = double.Parse(txtChieuDai.Text);
double rong = double.Parse(txtChieuRong.Text);
HinhChuNhat h = new HinhChuNhat {
ChieuDai = dai, ChieuRong = rong
};
double dt = h.DienTich();
char sup2 = (char)178;
txtDienTich.Text = dt.ToString("#,##0m") + sup2.ToString();
}