FileStream to byte[] C#

FileStream to byte array c sharp
FileStream to byte array c sharp

We just created the byte array. here is the code below

With Framework .NET 4 and above, I had use Stream.CopyTo. Create the MemoryStream, call stream.CopyTo(ms) and then return ms.ToArray(). The convert is done.

With the Stream.Read statement you will not always be able to read everything that is asked of you. If you’re reading from a network stream, for example, you can read the value of a packet and then return, even if there will be more data soon. BinaryReader.Read will continue to the end of the stream or to the specified size, but must still know the size to start.

You can even make the code a bit more elegant with extensions:

And then call it as a regular method:

Read(Byte[], Int32, Int32)

Reads a block of bytes from the stream and writes the data in a given buffer.


When this method returns, contains the specified byte array with the values between offset and (offset + count – 1) replaced by the bytes read from the current source.

The byte offset in array at which the read bytes will be placed.

The maximum number of bytes to read.

The total number of bytes read into the buffer. This might be less than the number of bytes requested if that number of bytes are not currently available, or zero if the end of the stream is reached.

Example in WPF with high performance

Reading and recording files
FileStream provides access to files at the byte level, so, for example, if you have to count or write one or more lines into a text file, the array of bytes should be converted into strings using special methods. That’s why other classes are used to work with text files.

At the same time, when dealing with different binary files that have a specific structure, FileStream can be very useful for extracting certain portions of information and processing it.

Let’s look at the example of reading-record in a text file:

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