I am trying to collect fields from the Case database, some for display and one for editing.

The fields for display are: CaseNumber, Accountid, Subject, Description, Contactid, Ownerid, CreatedDate 

The field I want to update is: Comment.

I would like to display prior Comments and give the user the option to add a Comment.

I am successful in collecting the first set of fields but when I add Comment to the list I get:

Error: Compile Error: No   such column 'Comment' on entity 'Case'. If you are attempting to use a custom   field, be sure to append the '__c' after the custom field name. Please   reference your WSDL or the describe call for the appropriate names. at line   14 column 12

I see Comment ilisted n the Case Standard Fields

How do I collect the field?

Here is my code:

public class RequestViewExtension {
    public Case cs;
        ApexPages.StandardController controller;
   
    public RequestViewExtension (ApexPages.StandardController con)
    {
        controller = con;
        this.cs = (Case) con.getRecord();
    }

    public list<Case> case1{get;set;}
    public list<Case> getcases()
    {
     case1=[Select Priority,CaseNumber,Accountid,Subject,Description,Contactid,Ownerid,CreatedDate from case where CaseNumber=:ApexPages.currentPage().getParameters().get('CaseNumber')];  
     return case1;
    }
    
    public String Comment
    {
        get;
        set;
    }
}