Hello Ravi Danum
the MSDN documentation has this to say about System.Search.QueryFocusedSummary
"The query-focused summary of the document. This is automatically created by the search system. Use this property only when consuming the values in your application, not for providing values to a property handler."
This essentially says that it is not a column in the search index, but rather built as a summary by the query execution process. Please try in your code if you can read this property from the result set. Since you haven't posted any code that does the actual processing of the results I'm a bit in the air here since I have sofar no experience in using this API. Maybe expanding on your question with a bit more code would help us pinpoint where you can try to read this value.