Asp.net 在我的项目的images文件夹中存储图像有困难

我想将图像存储在项目的根文件夹中。。但是图像被存储在admin文件夹->images中。这是我的C#code：这段代码写在admin pannel->AddProducts文件中

protected void Button3_Click(object sender, EventArgs e)
{
    FileUpload FileUpload1 = FileImage;
    string virtualFolder = "images/";
    string img = "images/";
    string f = (DateTime.Now.GetHashCode()).ToString(); ;
    string physicalFolder = Server.MapPath(virtualFolder);
    FileUpload1.SaveAs(physicalFolder + f + FileUpload1.FileName);        
    Image1.Visible = true;
    Image1.ImageUrl = virtualFolder + f + FileUpload1.FileName;
    string path = img + f + FileUpload1.FileName;
    TextBox4.Text = path;   
}

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每当使用Server.mappath时，始终使用

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符号

  protected void Button3_Click(object sender, EventArgs e)
    {
        FileUpload FileUpload1 = FileImage;
        string virtualFolder = "~/images/";
        string img = "~/images/";
        string f = (DateTime.Now.GetHashCode()).ToString(); ;
        string physicalFolder = Server.MapPath(virtualFolder);
        FileUpload1.SaveAs(physicalFolder + f + FileUpload1.FileName);
        Image1.Visible = true;
        Image1.ImageUrl = virtualFolder + f + FileUpload1.FileName;
        string path = img + f + FileUpload1.FileName;
        TextBox4.Text = path;
    }

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Thanx。。我明白了……）