[Mono-dev] Problems with FileStream.Lock();

[Terry-Watts.com]

I have a class that work fine in C# under Windows but not under Monodroid.

A simplified version of the class is:

|public  class  LockedStream  :  FileStream
{
     ulong  LockCount  =  0;
     bool  _IsNewFile;

       LockedStream(  bool  IsNewFile,  string  path,  FileMode  mode,  FileAccess  access,  FileShare  share)
                   :  base(  MakePath(  path),  mode,  access,  share)
          {
            _IsNewFile  =  IsNewFile;
          }

    public  LockedStream(  string  path,  FileMode  mode,  FileAccess  access,  FileShare  share)
                   :  this(  !File.Exists(  path),  path,  mode,  access,  share)
          {
          }

    public  static  internal  LockedStream  Open(  string  FilePathName  )
         {
            return  (  new  LockedStream(  FilePathName,  FileMode.OpenOrCreate,  FileAccess.ReadWrite,  FileShare.ReadWrite  )  );
         }

     public  void  Lock()
         {
             if(  LockCount++  ==  0  )
             {
                  int  SleepCount  =  1;

                     while(  true  )
                     {
                         try
                         {
                             base.Lock(  0,  Int64.MaxValue  );
                             break;
                          }
                          catch(  Exception  E)
                          {
                               Thread.Sleep(  SleepCount++  );
                          }
                      }
              }
         }

    public  void  UnLock()
           {
               if(  LockCount  >  0  )
               {
                   if(  --LockCount  ==  0  )
                   {
                       try
                       {
                           base.Unlock(  0,  Int64.MaxValue  );
                       }
                       catch(  Exception  )
                       {
                       }
                    }
                }
            }

}|

Now when I do:

|LockedStream  Stream  =  LockedStream.Open(  "Some Path/file name"  );
      Stream.Lock();|

I get the file created when I call the Open(); but when I call 
Stream.Lock(); I hangs in the lock routine forever because base.Lock( 0, 
Int64.MaxValue ); throws a lock violation exception even though the file 
isn't locked.

Does anybody know why this is happening on Android?

Thanks in advance.

Terry

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