Chart tool is greyed out in Visual Studio

Question

I\'m trying to add a chart to my Visual Studio form but the button is greyed out. I\'m using .NET Framework 3.5 and C#. Following instructions online I\'ve downloaded and in

Answer 1

I too had this issue and could not resolve it for hours.

As posted here: Visual Studio 2010 toolbox controls disabled or inactive

In order to solve it for me I just right-clicked one of the items in the toolbox, and chose "Reset Toolbox"

This resets the entire toolbox, so as mentioned in the answer above, all custom tools are lost and need to be re-imported.