How to Use Sandbox Solution Code which is given in my BLOG

Usage  ex :-

FileStream stream = null;             string sitecollectionUrl = "http://samplesitecollection:port";             string UploadFileName = @"C:\HelloWorldSolution.wsp";             FileInfo fileInfo = new FileInfo(UploadFileName);             //Verifying the condition whether that file is existed (or) not             if (!fileInfo.Exists) { throw new InvalidOperationException("The file does not exist."); }             byte[] bytes = System.IO.File.ReadAllBytes(fileInfo.Name);             //If file existed converting it in to the stream to transfer             stream = File.OpenRead(UploadFileName);             stream.Position = 0;             //checking if the solution is uploaded in sitecollection solution gallery             bool SolutionExits = CheckSolutionExits(sitecollectionUrl, fileInfo.Name);                         if (SolutionExits != true)             {                 //add solution & activate                bool SuccessDeployed = AddActivateSolutionbytes(sitecollectionUrl, fileInfo.Name, bytes);             }             if (SolutionExits == true)             {                 //remove solution                 bool RemoveSuccess = RemoveSolution(sitecollectionUrl, fileInfo.Name);             }