Fixed Readme

RichTextBox/CreateCustomMergeField/Readme.md

@@ -1,4 +1,5 @@
-##Custom Caret##
-This example demonstrates how to handle the input in RadRichTextBox. When you inherit RadRichTextBox Caret object and override the appropriate methods, you get a full control of user's input.
+##Create Custom Merge Field##
+
+This example demonstrates how to create a custom merge field. The business object in the example contains a list of products. Our merge field will use this list to create a table with all products. The main part of the code is the __GetResultFragment__ method. In this method you can use the business object to create a content that best suits your requirement.
 
 <keywords: replace, inherit>