How to read blocks of data from a file

Hi, I would like to know how to perform, in C#, a function that is similar to C/C++ fread() (reading data from a file in one block to a memory buffer). This one is much faster than the usual fscanf() function. I know FileStream.Read() allows to read byte arrays. But how do we then read something else like double or int arrays? Thanks in adavance for your help, M&Ms