[C#] File to Byte Array, Byte Array to File

using System.IO;
...
public byte[] FileToByteArray(string path) {
  byte[] fileBytes = null;
  try {
    using(FileStream fileStream = new FileSystem(path, FileMode.Open)) {
      fileBytes = new byte[fileStream.Length];
      fileStream.Read(fileBytes, 0, fileBytes.Length);
    }
  } catch (Exception e) {
    // Exception ...
  }
  return fileBytes;
}

using System.IO;
...
public bool ByteArrayToFile(string path, byte[] buffer) {
  try {
    using(FileStream fileStream = new FileSystem(path, FileMode.Create)) {
      fileStream.Write(buffer, 0, buffer.Length);
    }
    return true;
  } catch (Exception e) {
    // Exception ...
  }
  return false;
}

using System.IO;
...
public bool ByteArrayToFile2(string path, byte[] buffer) { 
  try {
    File.WriteAllBytes(path, buffer);
    return true;
  catch (Exception e) {
    // Exception ...
  }
  return false; 
}