public LongPath(string path)
{
Check.DoRequireArgumentNotNull(path, "path");
Check.DoCheckArgument(!string.IsNullOrEmpty(path), string.Empty, "path");
StringBuilder bld = new StringBuilder(path.Length + 5);
uint size = WindowsNative.GetFullPathName(path, (uint)bld.Capacity, bld, IntPtr.Zero);
if (size > bld.Capacity)
{
bld.Capacity = (int)size + 5;
size = WindowsNative.GetFullPathName(path, size, bld, IntPtr.Zero);
}
Check.DoAssertLambda(size > 0, () => WindowsNative.GetLastErrorException("path"));
Check.DoAssertLambda(size <= WindowsNative.MAX_LONG_PATH, () => new PathTooLongException());
bld.Insert(0, WindowsNative.LongPathPrefix);
PathString = bld.ToString();
}