public string CheckBlobfromBlobStorage(string foldername, string blobfilename)
        {
            string isblobexists = "false";

            try
            {
                CloudBlockBlob blockBlobReference = new CloudStorageAccount(new StorageCredentials(AccountName, AccountKey), true).CreateCloudBlobClient().GetContainerReference(ContainerName + "/" + foldername).GetBlockBlobReference(blobfilename);

                if (blockBlobReference.Exists())
                {
                    isblobexists = "true";

                    if (blockBlobReference.Properties.Length > 4500)
                    {
                        isblobexists = "true";
                    }

                    else
                    {
                        isblobexists = "Blank";
                    }
                }

                else

                {
                    isblobexists = "false";
                }


                return(isblobexists);
            }
            catch (Exception ex)
            {
                return("false");
            }
        }