Display all errors in a document

void editor_DocumentIndicatorAdded(object sender, IndicatorEventArgs e)
{
    // Remove any syntax errors that has this tag prefix ie: <aa:myTagName> ... "'aa' is an undeclared prefix. Line 5, position 3." 
    if (e.Indicator is SyntaxErrorSpanIndicator)
    {
        SyntaxErrorSpanIndicator si = (SyntaxErrorSpanIndicator)e.Indicator;
        if (((SyntaxError)si.Tag).Message.Contains("'aa'"))
        {
            Console.WriteLine(((SyntaxError)si.Tag).Message);
            editor.Document.SpanIndicatorLayers[SyntaxErrorSpanIndicator.DefaultName].Remove(si);
        }
    }
}

protected override void OnDocumentSemanticParseDataChanged(Document document, EventArgs e)
        {
            base.OnDocumentSemanticParseDataChanged(document, e);
            if (document.SemanticParseData == null) return;
            IList syntaxErrors = ((ICompilationUnit)document.SemanticParseData).SyntaxErrors;

            Console.WriteLine("Errors Before: {0}", syntaxErrors.Count);
            for (int index = 0; index < syntaxErrors.Count; index++)
            {
                SyntaxError error = (SyntaxError)syntaxErrors[index];
                if (error.Message.Contains("/aa"))
                    ((ICompilationUnit)document.SemanticParseData).SyntaxErrors.RemoveAt(index);
            }
            Console.WriteLine("Errors After: {0}", syntaxErrors.Count);
        }