public static async Task <string> LogExceptionAsync(Exception e)
{
var filename = new StringBuilder().Append("Exception - ").Append(DateTime.Now.ToString("yyyy-MMM-dd-HH-mm-ss")).Append(".crashlog").ToString();
//await Task.Run(async ()=> await AppStorage.WriteToFileAsync (filename, GetExceptionDetails (e)));
await AppStorage.WriteToFileAsync(filename, GetExceptionDetails (e));
return(filename);
}