Convention ... coding trend?

Question

hi
 
i know that with languages there is a trend that follows, for instance sometimes for member variables they start with 'Mvar' or P for private ... and sometimes there is use of lower case and upper case when declaring stuff .. like this 'testPerson'   (test having the lower case 't') ... are there the same rules for c# for good coding practice?
 
will member variables start with mvar or P for good practice? ...