I have this piece of code that has not been modified but all of a sudden it has stopped working... I could swear that it used to work but can't guarantee it. It throws an exception:

> 
> Attempted to read or write protected memory. This is often an indication that other memory is corrupt.
> 
> 
> 

```
static void Main(string[] args)
{
    ErrorMsg(123);
}

[DllImport("kernel32.dll", EntryPoint = "FormatMessageW", CharSet = CharSet.Auto)]
static extern int FormatMessage(int dwFlags, IntPtr lpSource, long dwMessageId, int dwLanguageId, out IntPtr MsgBuffer, int nSize, IntPtr Arguments);

[DllImport("kernel32.dll", CharSet = CharSet.Auto)]
public static extern int GetThreadLocale();

/// <summary>
/// Gets a Locale specific windows error
/// code specified.
/// </summary>
/// <param name="errorcode">The errorcode.</param>
public static string ErrorMsg(long errorcode)
{
    try
    {
        if (errorcode == 0)
            return "No Error";
        IntPtr pMessageBuffer;
        int dwBufferLength;
        string sMsg;
        int dwFormatFlags;
        //FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS
        dwFormatFlags = 0x00000100 | 0x00000200 | 0x00001000;
        dwBufferLength = FormatMessage(dwFormatFlags, IntPtr.Zero, errorcode, GetThreadLocale(), out pMessageBuffer, 0, IntPtr.Zero);
        if (dwBufferLength == 0)
            return "An Unknown Error Has occured.";
        sMsg = Marshal.PtrToStringUni(pMessageBuffer);
        Marshal.FreeHGlobal(pMessageBuffer);
        return sMsg;
    }
    catch (Exception ex)
    {
        return "An Unknown Error Has occured.";
    }
}

```

What am I doing wrong here, I can't seem to find anything? Thanks!