>>It doesn't like this line:
>>
>>
>>ArrayList list = new ArrayList() { "One", "Two", "Three" };
>>
>>Do you know how can I fix it?
>>
>
>What does the error message say?
>
>I'm going to guess you are missing:
>
>using System.Collections;
>
>Add that to the top of the .cs file.

No, I had it. It was saying ; expected, so I solved it using Add method instead. Don't know why your code didn't work for me.

Now I'm having some other problems.

System.FormatException was unhandled by user code
Message="Input string was not in a correct format."
Source="mscorlib"
StackTrace:
at System.Number.StringToNumber(String str, NumberStyles options, NumberBuffer& number, NumberFormatInfo info, Boolean parseDecimal)
at System.Number.ParseInt32(String s, NumberStyles style, NumberFormatInfo info)
at System.String.System.IConvertible.ToInt32(IFormatProvider provider)
at System.Convert.ToInt32(Object value)
at AddUsers_Default.grdvwUsers_RowCommand(Object sender, GridViewCommandEventArgs args) in c:\Development\Visual Studio 2005\WebSites\FCAdmin\AddUsers\Default.aspx.cs:line 145
at System.Web.UI.WebControls.GridView.OnRowCommand(GridViewCommandEventArgs e)
at System.Web.UI.WebControls.GridView.HandleEvent(EventArgs e, Boolean causesValidation, String validationGroup)
at System.Web.UI.WebControls.GridView.OnBubbleEvent(Object source, EventArgs e)
at System.Web.UI.Control.RaiseBubbleEvent(Object source, EventArgs args)
at System.Web.UI.WebControls.GridViewRow.OnBubbleEvent(Object source, EventArgs e)
at System.Web.UI.Control.RaiseBubbleEvent(Object source, EventArgs args)
at System.Web.UI.WebControls.LinkButton.OnCommand(CommandEventArgs e)
at System.Web.UI.WebControls.LinkButton.RaisePostBackEvent(String eventArgument)
at System.Web.UI.WebControls.LinkButton.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument)
at System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument)
at System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData)
at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)