third party controls

how can we use third party controls in .net and what r third party controlsThird party controls are speacialized components meant to deliver functionality out of box. For example, if your application needs lot of graphics/graphs to be generated instead of using GDI+ API in .NET framework to develop the application, you may consider using components from a company calledwww.telerik.com
They have already developed and invested lot of time to develop this specific funtionality. Hence we could readily buy it and start using it in .NET application. It saves lot of time and effort.
You will open VS.NET and add reference of the newly installed components. These components are called third party components as they are being provided by party outside of Microsoft.