How to check a file is ReadOnly in ASP .NET and in C# Example/Sample code

How to check a file is ReadOnly in ASP .NET and in C# Example/Sample code

ASP.NET and C# sample code: 

static bool IsFileOpenOrReadOnly(string file)

{

try

{

            //make sure it's not a read only file

            if ((File.GetAttributes(file) & FileAttributes.ReadOnly) != FileAttributes.ReadOnly)

            {

                  //open the file with a FileStream

                  using (FileStream stream = new FileStream(file, FileMode.OpenOrCreate, FileAccess.Read, FileShare.None))

                  {

                        try

                        {

                            stream.ReadByte();

                            return false;

                        }

                        catch (IOException)

                        {

                            return true;

                        }

                        finally

                        {

                            stream.Close();

                            stream.Dispose();

                        }

                    }

}

else

return true;

}

catch (IOException ex)

{

return true;

}

}