using System;

public static class ClipboardFusionHelper
{
public static string ProcessText(string text)
{
BFS.Clipboard.CopyText(out text);
if (text.Contains("TASK"))
{
;
}

BFS.Clipboard.PasteText(text + (", "));
return null;
}
}

using System;

public static class ClipboardFusionHelper
{
    public static string ProcessText(string text)
    {
        BFS.Clipboard.CopyText(out text);

        //!text.EndsWith(",") This will serve as a condition that if the "," already exist at the end of the text with TASK 
        //then do not put another so you don't get something like this -> TASK123,,

        //Remove && !text.EndsWith(",") from below IF statement, if you don't want the check :)

        if (text.Contains("TASK") && !text.EndsWith(","))
        {   
            text += ",";
        }

        BFS.Clipboard.PasteText(text);
        return null;
    }
}