how to convert binary data to string

Question

hi,
   i want to know how to convert binary data to string by using memory stream.here i specify my codings

Binaryreader br=new binaryreader(fileupload1.postedfile.inputstream); 
byte[] resume=br.readbytes(fileupload1.postedfile.contentlength);
now the variable resume contains the large amont of binary data how can i convert it.