C# – PInvokeStackImbalance在一个记录良好的函数中检测到？

[DllImport("user32.dll",CharSet = CharSet.Auto,CallingConvention = CallingConvention.StdCall)]
    public static extern void mouse_event(long dwFlags,long dx,long dy,long cButtons,long dwExtraInfo);


    private const long MOUSEEVENTF_LEFTDOWN = 0x02;
    private const long MOUSEEVENTF_LEFTUP = 0x04;
    private const long MOUSEEVENTF_RIGHTDOWN = 0x08;
    private const long MOUSEEVENTF_RIGHTUP = 0x10;
    private void ClickMouse()
    {
        long X = Cursor.Position.X;
        long Y = Cursor.Position.Y;
        mouse_event(MOUSEEVENTF_LEFTDOWN | MOUSEEVENTF_LEFTUP,X,Y,0);

    }

由于某些原因,当我的程序来到这个代码,它会抛出这个错误信息：

PInvokeStackImbalance was detected Message: A call to PInvoke function
‘WindowsFormsApplication1!WindowsFormsApplication1.Form1::mouse_event’
has unbalanced the stack. This is likely because the managed PInvoke
signature does not match the unmanaged target signature. Check that
the calling convention and parameters of the PInvoke signature match
the target unmanaged signature.

请帮忙？