ReSharper 2017.2 Help

Generating Code from Usage

ReSharper lets you use code symbols ( classes, methods, variables, properties, fields, etc.) before you declare them. When ReSharper detects an undeclared symbol, it suggests one or more quick-fixes for generating the corresponding symbol based on the usage, and then smartly adjust the declaration according to the usage context:

'Generate from usage' quick-fix

For example, if you create a method from usage, ReSharper will not only create a method, but also detect its return type and types of its parameters:

Code Analysis Examples of Quick Fixes undefined method return type

Depending on your settings, in the bodies of generated implementations ReSharper throws new NotImplementedException(), returns default value, or puts code that will not compile. You can configure your preferences on the Code Editing | Members Generation page of ReSharper options.

For additional examples of how ReSharper creates code symbols from usages, see Undefined variable and Undefined method call samples in the Examples of Quick-Fixes.

This feature is supported in the following languages and technologies:

Language: C#
Language: VB.NET
Language: C++
Language: HTML
Language: ASP.NET
Language: Razor
Language: JavaScript
Language: TypeScript
Language: CSS
Language: XML
Language: XAML
Language: Resx
Language: Build Scripts
Language: Protobuf
Language: JSON
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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.

Last modified: 10 November 2017

See Also