Smart Completion

ReSharper | Edit | Smart Code Completion
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ReSharper_CompleteCodeSmart

This command filters the list of types, methods, and variables to match the expected type of an expression. It works anywhere as long as ReSharper can determine the expected type of the expression, for example, right-hand sides of assignments, variable initializers, or return statements. If several return types are possible, ReSharper detects the most recently used symbol of an applicable type and automatically selects it in the lookup list. Smart Completion can also suggest creating anonymous delegates, lambda expressions, and regular methods, as well as local variables for out parameters. In addition to that, in object initializers, Smart Completion suggests fields/properties that were not yet assigned a value.

By default, smart completion items are included in the suggestion lists of automatic and basic completion. If you want to change the default behavior, use the corresponding controls on the Environment | IntelliSense | Completion Behavior page of ReSharper options.

You can also invoke smart completion on an existing identifier. In this case, there are two ways to apply the selected completion suggestion; press Enter to insert it and leave the existing item or press Tab to replace the existing item (If necessary, you can change the default shortcuts on the Environment | IntelliSense | Completion Characters page of ReSharper options).

Examples of smart completion

You can use the following examples to get an idea of how smart completion works with various code items:

After a return statement

In the right-hand side of assignments

In cast expressions

Before:

After launching Smart Completion (since there's a single option in this case, ReSharper inserts the expected type without displaying a drop-down list):

In object initializers

ReSharper provides Smart Completion for setting properties in object initializers that were not previously set for a particular object:

In lambda expressions

In addition to traditional anonymous and named methods, Smart Completion readily generates lambda-expression syntax:

Creating a local variable in place of an out parameter

Using CamelHumps

This feature is supported in the following languages and technologies:

The instructions and examples given here address the use of the feature in C#. For details specific to other languages, see corresponding topics in the ReSharper by Language section.