System.UIntPtr.ToUInt64 C# (CSharp) Метод

        public unsafe ulong ToUInt64() {
            return (ulong)m_value;
        }
      

		public void SetDateTime (OciHandle handle, OciErrorHandle errorHandle,
					short year, byte month, byte day,
					byte hour, byte min, byte sec, uint fsec, string timezone)
		{
			// Get size of buffer
			ulong rsize = 0;
			UIntPtr rsizep = new UIntPtr (rsize);
			int status = OciCalls.OCIUnicodeToCharSet (handle, null, timezone, ref rsizep);

			// Fill buffer
			rsize = rsizep.ToUInt64 ();
			byte[] bytes = new byte[rsize];
			if (status == 0 && rsize > 0)
				OciCalls.OCIUnicodeToCharSet (handle, bytes, timezone, ref rsizep);

			if (fsec > 0)
				fsec = fsec * 1000000;

			uint timezoneSize = (uint) bytes.Length;
			OciCalls.OCIDateTimeConstruct (handle,
				errorHandle, this.Handle,
				year, month, day,
				hour, min, sec, fsec,
				bytes, timezoneSize);

			//uint valid = 0;
			//int result = OciCalls.OCIDateTimeCheck (handle,
			//	errorHandle, this.Handle, out valid);
		}