AvalonHelpers.ColorizeAvalonEdit.ColorizeLine C# (CSharp) Method

        protected override void ColorizeLine(DocumentLine line)
        {
            int lineStartOffset = line.Offset;
            string text = CurrentContext.Document.GetText(line);
            int start = 0;
            int index;
            while ((index = text.IndexOf("var", start, System.StringComparison.Ordinal)) >= 0)
            {
                ChangeLinePart(
                    lineStartOffset + index, // startOffset
                    lineStartOffset + index + 3, // endOffset
                    element =>
                    {
                        // This lambda gets called once for every VisualLineElement
                        // between the specified offsets.
                        Typeface tf = element.TextRunProperties.Typeface;
                        // Replace the typeface with a modified version of
                        // the same typeface
                        element.TextRunProperties.SetTypeface(new Typeface(
                            tf.FontFamily,
                            FontStyles.Italic,
                            FontWeights.Bold,
                            tf.Stretch
                        ));
                    });
                start = index + 1; // search for next occurrence
            }
        }