Something

    internal class BooCompiler : TestparserAnalyzer
    {

        
        public override PerCederberg.Grammatica.Parser.Node  ExitTemplateblock(PerCederberg.Grammatica.Parser.Production node)
        {
            Token tokenNode = node.GetChildAt(0) as Token;
            string result = tokenNode.GetImage();
            System.Diagnostics.Debug.Write(result);
            node.AddValue(result);
            return base.ExitTemplateblock(node);
        }
        
        //public override void Ex
    }


Produces

Hello, this is a boo template
This is some more template stuff

This is item ${item}