封送C++JigGrand数组给出“无效托管/非托管类型组合”错误

这是我的C++定义:

typedef struct _DRIVER_VERSION
{
DWORD DriverNum;
CHAR Version[16][16];
} DRIVER_INFO, *PDRIVER_INFO;

THSI是我的C interop代码:

[StructLayoutAttribute(LayoutKind.Sequential, CharSet = CharSet.Ansi)]
public struct Version16
{
    [MarshalAsAttribute(UnmanagedType.ByValTStr, SizeConst = 16)]
    public string VerInfo;
}


/// </summary>
[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi)]
public struct _DRIVER_VERSION
{
    public System.UInt32 DriverNum;
    [MarshalAsAttribute(UnmanagedType.ByValArray, SizeConst = 16)]
    public Version16 Version16;

}

    public static class InstallDeviceClass
{
    [DllImport(@"driver.dll")]
    public static extern SResultEnum s4drv_GetDriverInfo(ref _DRIVER_VERSION pDrvInfo);
}

    static void Main(string[] args)
    {
        _DRIVER_VERSION version=new _DRIVER_VERSION();
        var s4Res = InstallDeviceClass.s4drv_GetDriverInfo(ref version);
    }

但是,当我运行代码时,我会

$exception“无法封送类型为”version16“的字段 “_driver_version”:无效的托管/非托管类型组合(此 值类型必须与结构成对出现)。“:”“System.TypeLoadException

为什么会发生这种情况,以及如何解决这种情况?