c# - Download and save image into Application.persistentDataPath hangs the app -

i wrote game can download images server , store them inside application.persistentdatapath.

my problem when saving few images scene hangs , when done saving, executes rest of code.

how can solve issue?

saving image device local storage:

    if (file.exists (application.persistentdatapath + "/layoutimages/")) {         debug.log (imagespathprefix + " exists.");         return;     }      file.writeallbytes (application.persistentdatapath + "/layoutimages/abc.jpg", image); 

you can create thread performing operation on side. here example :

class filedownloader {     struct parameterobject     {         public string url;         public string savepath;     }      static void downloadfunction(object data)     {         parameterobject obj = (parameterobject)data;          if (file.exists(obj.savepath))             return;          using (webclient client = new webclient())         {             client.downloadfile(obj.url, obj.savepath);         }     }      public static void downloadfromurl(string url, string savepath)     {          parameterobject obj = new parameterobject();         obj.url = url;         obj.savepath = savepath;          thread thread = new thread(filedownloader.downloadfunction);         thread.start(obj);      } } 

note: if use image download, not use threading. unity3d not thread safe.