Merge pull request #378 from AArnott/fix377

Workaround for .NET Native toolchain issue

src/Kernel32/Kernel32.cs

@@ -94,7 +94,7 @@ public static partial class Kernel32
         /// If the function succeeds, the return value is a search handle used in a subsequent call to FindNextFile or FindClose, and the lpFindFileData parameter contains information about the first file or directory found.
         /// If the function fails or fails to locate files from the search string in the lpFileName parameter, the return value is INVALID_HANDLE_VALUE and the contents of lpFindFileData are indeterminate.To get extended error information, call the <see cref="GetLastError"/> function.
         /// </returns>
-        [DllImport(api_ms_win_core_file_l1_2_0, CharSet = CharSet.Unicode)]
+        [DllImport(api_ms_win_core_file_l1_2_0, EntryPoint = "FindFirstFileExW", ExactSpelling = true, CharSet = CharSet.Unicode)]
         public static unsafe extern SafeFindFilesHandle FindFirstFileEx(string lpFileName, FINDEX_INFO_LEVELS fInfoLevelId, out WIN32_FIND_DATA lpFindFileData, FINDEX_SEARCH_OPS fSearchOp, void* lpSearchFilter, FindFirstFileExFlags dwAdditionalFlags);
 
         /// <summary>
@@ -141,7 +141,7 @@ public static partial class Kernel32
         /// If the function succeeds, the return value is the number of TCHARs stored in the output buffer, excluding the terminating null character.
         /// If the function fails, the return value is zero. To get extended error information, call <see cref="GetLastError"/>.
         /// </returns>
-        [DllImport(api_ms_win_core_localization_l1_2_0, CharSet = CharSet.Unicode, SetLastError = true)]
+        [DllImport(api_ms_win_core_localization_l1_2_0, CharSet = CharSet.Unicode, EntryPoint = "FormatMessageW", ExactSpelling = true, SetLastError = true)]
         public static unsafe extern int FormatMessage(FormatMessageFlags dwFlags, void* lpSource, int dwMessageId, int dwLanguageId, StringBuilder lpBuffer, int nSize, IntPtr[] Arguments);
 
         /// <summary>
@@ -483,7 +483,7 @@ public static extern WaitForSingleObjectResult WaitForSingleObject(
         /// If the function fails, the return value is NULL. To get extended error information, call GetLastError.
         /// If the mutex is a named mutex and the object existed before this function call, the return value is a handle to the existing object, GetLastError returns ERROR_ALREADY_EXISTS, bInitialOwner is ignored, and the calling thread is not granted ownership. However, if the caller has limited access rights, the function will fail with ERROR_ACCESS_DENIED and the caller should use the OpenMutex function.
         /// </returns>
-        [DllImport(api_ms_win_core_synch_l1_2_0, CharSet = CharSet.Unicode, SetLastError = true)]
+        [DllImport(api_ms_win_core_synch_l1_2_0, EntryPoint = "CreateMutexW", ExactSpelling = true, CharSet = CharSet.Unicode, SetLastError = true)]
         public static extern unsafe SafeObjectHandle CreateMutex(
             [Friendly(FriendlyFlags.Optional | FriendlyFlags.In)] SECURITY_ATTRIBUTES* lpMutexAttributes,
             [MarshalAs(UnmanagedType.Bool)] bool bInitialOwner,