Solution:If you are reading from list using client object model. Don't loop for all records, Just give some limit for row count, like how many records it has to read. Then in another loop u can start for reaming records.
Timeout error.
The operation got timed out.
if you give more number of row count, you will get this error. reduce the row count then it will work
Final Solution:
Call below statement for every 50 items...
context.ExecuteQuery();