Download WSP Solution from SharePoint

Once a solution has been added to SharePoint, then there's no way to download it. Using the SharePoint object model we can easily download a WSP using the 'SaveAs' method. 

The C# code below illustrates how to download all of the solutions in the farm with just a few lines.

private void DownLoadAllSolutions()

       {

            SPSolutionCollection wspSolutions = SPFarm.Local.Solutions;

            foreach (SPSolution solution in wspSolutions)

            {

                 SPPersistedFile wspFile = solution.SolutionFile;

                 DownLoadWSP(wspFile);

            }

        }


        private void DownLoadWSP(SPPersistedFile wspFile)

        {

            if (wspFile != null)

            {

                 string wspFileName = Path.Combine(@"c:\temp",wspFile.Name);

                if(File.Exists(wspFileName))

                {

                     File.Delete(wspFileName);

                }

wspFile.SaveAs(wspFileName);

             }

         }