Hello there, I manually added Telerik winform controls in VS2015. I can
use all the controls when I add and then when I close vs all telerik
controls disappear from toolbox and again I have to add manually all the
controls when I starts to work next time. Help needed ASAP.

Thank You!

Hello Sunil,

Thank you for contacting us.

I can suggest you to try to completely reset your Visual Studio Toolbox by following these steps:

1. Close all Visual Studio instances.
2. Open the "%localappdata%\Microsoft\VisualStudio\14.0"  folder and remove all *.tbd files.
3. Using the "regedit.exe" tool, find "HKEY_CURRENT_USER\Software\Microsoft\VisualStudio\14.0\ToolboxControlsInstaller_AssemblyFoldersExCache" and "HKEY_CURRENT_USER\Software\Microsoft\VisualStudio\14.0\ToolboxControlsInstallerCache" registry keys.
4. Remove everything from these keys leaving them empty.

After this you could use the Toolbox Configuration wizard to add required version of the controls to the toolbox.

Please get back to us if any further assistance is needed.

Regards, Nikolay Mishev
Progress Telerik