Double Completion

Double basic completion

When you invoke Basic completion Control+Space twice, ReSharper adds a number of new suggestions to the completion list.

Non-public members for the current symbol and its base types are added to the completion list.

Note that ReSharper still highlights the public member, suggesting to use it because the private member will produce non-compilable code. However, if you decide to use the private member it is very easy to make it public: just press Alt+Enter over the highlighted error and choose Make method public quick-fix.

If you check an object for a compatibility with a derived type, ReSharper adds members of this derived type and all intermediate types in the inheritance hierarchy to the completion list. If you choose one of them, ReSharper will automatically cast the variable to the this type:

You can also cast the sender argument in an event handler to the desired parent control type and access its members.

Double import completion

When you invoke Import Symbol Completion Control+Alt+Space twice, ReSharper adds public types and extension methods from non-references modules to the completion list. ReSharper looks for public types and extension methods in other projects within your solution as well as in all compiled assemblies that are referenced in other projects of your solution. The non-referenced modules are displayed in red:

If you choose an item from a non-referenced module ReSharper adds the missing references automatically. By default ReSharper displays a confirmation dialog for each new reference. If necessary, you can disable it by clearing the Show confirmation dialog before adding reference checkbox on the Environment | IntelliSense | Completion Behavior page of ReSharper options.

Double type-matching completion

When you invoke Smart completion Control+Shift+Space twice, ReSharper adds call chains that have return values of the expected data type.

You can press Control+Shift+Space multiple times to extend the list with more complicated call chains. The more times you press, the longer call chains become.

By default, ReSharper takes into account only instance methods and their return values. If necessary, you can also include extension methods to the list of suggestion. To do so, select Show extension methods in double type-matching completion on the Environment | IntelliSense | Completion Behavior page of ReSharper options Alt+R, O.