ParthKansara February 2016
Finally I found the solution,
Here is the code for the same
CloudFilesProvider cloudFilesProvider = GetCloudFileSytemObject();
Dictionary<string, string> dicMetadata = new Dictionary<string,string>();
cloudFilesProvider.CreateObject(strContainer, fupUploadStream, fileName, headers: dicMetadata);
Here '2592000(Seconds)' is equal to 30 Days.
This Code adds header to file 'X-Delete-At' with self calculation of date time of file to be deleted.
Now after the time we want to delete we are able to delete the file content ,
But file it self is not deleted.
I am searching for the same and trying to contact RackSpace Cloud.