Mono.DataConverter.UInt64FromBE C# (CSharp) Method

		static public unsafe ulong UInt64FromBE (byte [] data, int index)
		{
			if (data == null)
				throw new ArgumentNullException ("data");
			if (data.Length - index < 8)
				throw new ArgumentException ("index");
			if (index < 0)
				throw new ArgumentException ("index");
			
			ulong ret;
			fixed (byte *src = &data[index]){
				PutBytesBE ((byte *) &ret, src, 8);
			}
			return ret;
		}