Why not directly use Array.Copy and increment Position?

[niuk]

https://github.com/KillaMaaki/ReliableNetcode.NET/blob/09fba6a45ebb6f0d9d2be23bcd15c65b40b6c773/ReliableNetcode/Utils/IO/ByteStream.cs#L198-L202

[HexTank]

I guess the Read function could use some love too, something like..

		public override int Read(byte[] buffer, int offset, int count)
		{
			long pos = this.Position;
			long len = this.Length;
			int readBytes = (int)Math.Min(count, len - pos);
			Array.Copy(srcByteArray, pos, buffer, offset, readBytes);
			this.Position = pos + readBytes;
			return readBytes;
		}

[HexTank]

I also notice the Write doesn't deal with any buffer overflows like Read does. Not sure if that's important and is dealt with elsewhere.