Here’s an example of how to read a file in chunks of 1KB without loading the entire contents into memory:
const int chunkSize = 1024; // read the file by chunks of 1KB
using (var file = File.OpenRead("foo.dat"))
{
int bytesRead;
var buffer = new byte[chunkSize];
while ((bytesRead = file.Read(buffer, 0, buffer.Length)) > 0)
{
// TODO: Process bytesRead number of bytes from the buffer
// not the entire buffer as the size of the buffer is 1KB
// whereas the actual number of bytes that are read are
// stored in the bytesRead integer.
}
}