Hi L. M. Pathan,
If you don't have particular reason for not using the installer for RadControls for WinForms then I would suggest you to download the msi installation package and install it.
If you can't use the msi installation package then you will have to perform some more steps in order to use RadControls in your projects.
First in order to resolve the issue that when you drag a controls it doesn't appear on the form you need to either add all RadControls for WinForms dlls in the GAC or add a reference to the Telerik.WinControls.UI.Design.dll
to your project. Make sure that you add reference to the dll with the same version as the other Telerik assemblies.
The Telerik VS Project Templates that appear in the Add New Project dialog are part of the Visual Studio integration package. It can't be installed manually. You can install it as part of the RadControls for WinForms installer or through the Visual Studio Online Gallery if you are using Visual Studio 2010.
I hope the information is helpful. If you have any further questions,please write us again.
the Telerik team