C#

var timer = new DispatcherTimer
               {
                   Interval = new TimeSpan(0, 0, 3)//3 seconds
               };
           timer.Tick += timer_Tick;//Subscribe to a method which have functionality to run after Idle time.

void timer_Tick(object sender, object e)
       {
           //Do your operation
       }

timer.Start(); 

OriginalGriff wrote:

With serial data, you will get a DataReceived event fired when there is one of more characters received by the computer: it will not wait until they have all been read, because it does not know when the message ends.

void arduinoBoard_DataReceived(object sender, SerialDataReceivedEventArgs e)
{
    string data = arduinoBoard.ReadTo("\x03");//Read until the EOT code
    //Split into 'date=temperature' formatted text
    string[] dataArray = data.Split(new string[]
    {"\x02", "$" }, StringSplitOptions.RemoveEmptyEntries);
    //Iterate through the split data and parse it into weather data items
    //and add them to the list of received weather data.
    foreach (string dataItem in dataArray.ToList())
    {
       WeatherDataItem weatherDataItem = new WeatherDataItem();
       weatherDataItem.FromString(dataItem);
       weatherDataItems.Add(weatherDataItem);
     }

     if(NewWeatherDataReceived != null)//If there is someone waiting for this event to be fired
     {
       NewWeatherDataReceived(this, new EventArgs()); //Fire the event,
            // indicating that new WeatherData was added to the list.
     }
}

FilipJ wrote:

Service-based Database

• Start by building trivial applications that perform simple math calculations (e.g. addition, multiplication, identifying unique numbers in a collection, etc.)
  
• Next, get to know how to process character strings.
  
• Along the way, introduce yourself to the different types of collections (lists, arrays, dictionaries, sets) and see how and where they're used.
  
• Then, take a step into LINQ (Language Integrate Query Language) and see how LINQ makes it easy to do the things you did manually when you started working with collections.
  
• Get to know to read and write files (text files, binary files and compressed files).
  
• Then, introduce yourself to XML serialization and learn how to store and retrieved structured data from an XML file.
  
• Next, discover simple data access from a database and introduce yourself to the basics of SQL.
  
• Dip your toes into the wonderful world of fetching data from the internet and learn how to use the HttpClient class.