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I am using a Custom TextBox control in WinForms application. I want a property such that it has multiple values just like a combo box. Now when I choose any value in designer mode then how will that value get reflected in the CustomControl. I am not getting the logic. Kindly give any suggestion or hint.

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  • What should be the behavior of the control? What's your design-time and run-time requirement? Commented Jul 27, 2016 at 14:43
  • I need a property to validate, it will have three validationrules - a,b & c (say). Now in design mode when i select b validationrule then validationprovider attached to the customcontrol should use that b validationrule in it. Commented Jul 28, 2016 at 9:01
  • If just using showing a dropdown in property grid is enough, you can define an enum containing a, b and c. Then define a public property of type of that enum. This way the property grid will show a dropdown containing enum values for the property. Commented Jul 28, 2016 at 11:03
  • If showing just a dropdown for the property is not enough and for example some different properties should be for the selected rule, take a look at this post: WinForms designer properties of different derived types. It's suitable for cases when each validation rule has its own properties. Commented Jul 28, 2016 at 11:05
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