private static void InternalDelete(string fullPath, string userPath, bool recursive)
{
string demandDir = LongPathDirectory.GetDemandDir(fullPath, !recursive);
FileIOPermission.QuickDemand(FileIOPermissionAccess.Write, demandDir, false, false);
string text = Path.AddLongPathPrefix(fullPath);
Win32Native.WIN32_FILE_ATTRIBUTE_DATA win32_FILE_ATTRIBUTE_DATA = default(Win32Native.WIN32_FILE_ATTRIBUTE_DATA);
int num = File.FillAttributeInfo(text, ref win32_FILE_ATTRIBUTE_DATA, false, true);
if (num != 0)
{
if (num == 2)
{
num = 3;
}
__Error.WinIOError(num, fullPath);
}
if ((win32_FILE_ATTRIBUTE_DATA.fileAttributes & 1024) != 0)
{
recursive = false;
}
LongPathDirectory.DeleteHelper(text, userPath, recursive, true);
}
private static void DeleteHelper(string fullPath, string userPath, bool recursive, bool throwOnTopLevelDirectoryNotFound)
{
Exception ex = null;
if (recursive)
{
Win32Native.WIN32_FIND_DATA win32_FIND_DATA = default(Win32Native.WIN32_FIND_DATA);
string fileName;
if (fullPath.EndsWith(Path.DirectorySeparatorChar.ToString(), StringComparison.Ordinal))
{
fileName = fullPath + "*";
}
else
{
fileName = fullPath + Path.DirectorySeparatorChar.ToString() + "*";
}
int num;
using (SafeFindHandle safeFindHandle = Win32Native.FindFirstFile(fileName, ref win32_FIND_DATA))
{
if (safeFindHandle.IsInvalid)
{
num = Marshal.GetLastWin32Error();
__Error.WinIOError(num, userPath);
}
for (;;)
{
bool flag = (win32_FIND_DATA.dwFileAttributes & 16) != 0;
if (!flag)
{
goto IL_180;
}
if (!win32_FIND_DATA.IsRelativeDirectory)
{
bool flag2 = (win32_FIND_DATA.dwFileAttributes & 1024) == 0;
if (flag2)
{
string fullPath2 = LongPath.InternalCombine(fullPath, win32_FIND_DATA.cFileName);
string userPath2 = LongPath.InternalCombine(userPath, win32_FIND_DATA.cFileName);
try
{
LongPathDirectory.DeleteHelper(fullPath2, userPath2, recursive, false);
goto IL_1BD;
}
catch (Exception ex2)
{
if (ex == null)
{
ex = ex2;
}
goto IL_1BD;
}
}
if (win32_FIND_DATA.dwReserved0 == -1610612733)
{
string mountPoint = LongPath.InternalCombine(fullPath, win32_FIND_DATA.cFileName + Path.DirectorySeparatorChar.ToString());
if (!Win32Native.DeleteVolumeMountPoint(mountPoint))
{
num = Marshal.GetLastWin32Error();
if (num != 3)
{
try
{
__Error.WinIOError(num, win32_FIND_DATA.cFileName);
}
catch (Exception ex3)
{
if (ex == null)
{
ex = ex3;
}
}
}
}
}
string path = LongPath.InternalCombine(fullPath, win32_FIND_DATA.cFileName);
if (!Win32Native.RemoveDirectory(path))
{
num = Marshal.GetLastWin32Error();
if (num != 3)
{
try
{
__Error.WinIOError(num, win32_FIND_DATA.cFileName);
goto IL_1BD;
}
catch (Exception ex4)
{
if (ex == null)
{
ex = ex4;
}
goto IL_1BD;
}
goto IL_180;
}
}
}
IL_1BD:
if (!Win32Native.FindNextFile(safeFindHandle, ref win32_FIND_DATA))
{
break;
}
continue;
IL_180:
string path2 = LongPath.InternalCombine(fullPath, win32_FIND_DATA.cFileName);
if (Win32Native.DeleteFile(path2))
{
goto IL_1BD;
}
num = Marshal.GetLastWin32Error();
if (num != 2)
{
try
{
__Error.WinIOError(num, win32_FIND_DATA.cFileName);
}
catch (Exception ex5)
{
if (ex == null)
{
ex = ex5;
}
}
goto IL_1BD;
}
goto IL_1BD;
}
num = Marshal.GetLastWin32Error();
}
if (ex != null)
{
throw ex;
}
if (num != 0 && num != 18)
{
__Error.WinIOError(num, userPath);
}
}
if (!Win32Native.RemoveDirectory(fullPath))
{
int num = Marshal.GetLastWin32Error();
if (num == 2)
{
num = 3;
}
if (num == 5)
{
throw new IOException(Environment.GetResourceString("UnauthorizedAccess_IODenied_Path", new object[]
{
userPath
}));
}
if (num == 3 && !throwOnTopLevelDirectoryNotFound)
{
return;
}
__Error.WinIOError(num, userPath);
}
}