Question

I have a normal web form with code behind, in this code behind I can instantiate a couple of classes I have in the root folder, such as:

public partial class _Default : System.Web.UI.Page

{
    Helper helper = new Helper();

protected void Page_Load(object sender, EventArgs e)
{
    if (!Page.IsPostBack)
    {
        Initialise();
    }
}

And in the Helper class:

public class Helper
{

It’s working fine but I now want to move my class files (Helper.cs for example) to the app_code folder but when I run the application I get error on

SharePoint sharePoint = new SharePoint();

public string id { get; set; }

must declare a body because it is not marked abstract or extern

What is causing this issue and how do I fix it?

Thanks in advance

Answer 1

public string id { get; set; }

is an automatic property and these were added in C# v3.0 / .Net v3.5, so ensure you are targetting this version or higher in your project settings. If you wish to target an earlier version you’ll need to use properties with a backing field.