static extern bool GetMailslotInfo(IntPtr hMailslot, IntPtr lpMaxMessageSize,

static extern bool GetMailslotInfo(IntPtr hMailslot, out uint lpMaxMessageSize,

static extern bool GetMailslotInfo(IntPtr hMailslot, IntPtr lpMaxMessageSize,

var result = GetMailSlotInfo(handle, IntPtr.Zero, out nextSize, IntPtr.Zero, out readTimeout);