What's New in ReSharper 9 and 9.1

ReSharper 9 supports Visual Studio 2015 RC, C#6.0 and regular expressions; brings more bulk quick-fixes; vastly improves support for JavaScript & TypeScript; presents a new file layout editor and navigation actions. It is also based on a new platform, reducing memory consumption when ReSharper is installed in Visual Studio along with dotCover, dotTrace, and/or dotMemory.

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Support for C#6.0

Starting from version 9.0 ReSharper provides support for new language constructs introduced with C#6.0. Those include static usings, exception filters, string interpolation, nameof() operator and others. We are also introducing a set of new quick-fixes to replace curly brace delimited constructs with expression bodies, to update your null checking code using the new ?. operator, to transform to regular/verbatim interpolation or to update parameter references using nameof() operator.

nameof() operator support in ReSharper 9.1

Please see this post for more details on C#6.0 support.

Find type on NuGet

When you have a type or namespace used inside your project that can't be resolved to referenced libraries or packages, ReSharper can search for this type or namespace in the NuGet package gallery, display the list of matching packages and easily download and install the package that you choose.

NuGet references support in ReSharper 9.1

Enhanced JavaScript and TypeScript support

ReSharper 9 provides tons of enhancements for JavaScript and TypeScript development that include a set of new quick-fixes to cover over 270 different types of errors, new live templates for common TypeScript entities, and new code generation options to make it easier to implement interfaces or generate missing or overriding members.

ReSharper 9.1 supports EcmaScript 6, TypeScript 1.4 and TypeScript 1.5. ReSharper 9.1 adds support for JSDoc including syntax highlighting, quick documentation (Ctrl+Q) and code completion.

There's also a set of new refactorings for JavaScript and TypeScript. These include Introduce Field, Copy Type, move refactorings (Move Type To Module/File, Move Into Matching Files and Move To Folder), Rename File as well as the Import of Types for Pasted Code.

Import of Types for Pasted Code refactoring for TypeScript

Fix in Scope evolution

ReSharper 9 expands the Fix in Scope feature with an ability to remove redundant qualifiers, fix naming or remove regions in the scope of a project or the whole solution.

Fix in scope: Remove redundant qualifiers

Bulk imports support

ReSharper is now able to look through the code in your solution and generate the appropriate imports for all the types.

Bulk import type in ReSharper 9

This feature can import extension methods as well. The only case when ReSharper can't import a type is when it resolves to two different namespaces (e.g., System.String and User.String).

A new Go To Action feature searches for a particular action using the legendary Alt+Enter shortcut. Navigate to Exposing APIs command finds all methods that are capable of returning a particular type.

Go To Action in ReSharper 9

Find Usages gets a configurable setting for the Preview Tab, and it no longer blocks the UI on long-running searches. You can also filter or ignore particular issues in the Find Results Window that was updated not to produce extra tabs for the same type.

Visual Studio 2015 RC support

ReSharper 9.1.1 integrates with Visual Studio 2015 RC while preserving compatibility with previous releases of the Microsoft IDE including versions 2013, 2012 and 2010. ReSharper 9.1 integrates actions based on Visual Studio Roslyn, so when you want to make changes to your code, you can choose either ReSharper or Visual Studio to do it for you, from the same list of actions.

Visual Studio 2015 support in ReSharper 9.1

However, support for Visual Studio 2005 and 2008 is now discontinued. See this blog post for more details.

A new shared platform

Starting with ReSharper 9, we offer a single installer for all JetBrains .NET tools including ReSharper, dotTrace, dotMemory, dotCover and dotPeek. You will be able to choose which products you want to install and let the installer do the rest. All those tools will operate on a shared platform, which conserves resources when several products are running at the same time.

ReSharper 9: shared platform for all .NET tools

In addition to common installer we introduce ReSharper Ultimate, a single license that covers all JetBrains .NET tools.

Regular expressions

ReSharper 9 provides you with code completion for wildcards and regular expression groups, highlights errors, and offers a quick-fix to adjust wildcard backslashes to C# style. It comes with a separate Validation Utility for regular expressions that lets you quickly check input against a regular expression and get an immediate view of the matches and groups.

Validation Utility for regular expressions in ReSharper 9

Type Dependency Diagram

Adding to the Project Dependency Graph, ReSharper 9 expands its set of Architecture Tools with a Type Dependency Graph. This diagram can be most helpful for finding out what code depends on a particular type, and what the type itself depends on.

Type Dependency Diagram in ReSharper 9

Code style settings

With the new File Layout Editor you can easily customize your coding style settings in a single place without having to look through lots of different options. This works for C#, VB.NET, HTML, JavaScript and TypeScript.

Code style setting in ReSharper 9

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What′s new in ReSharper Ultimate

ReSharper is a part of the ReSharper Ultimate family along with dotTrace, dotCover, dotMemory, dotPeek and ReSharper C++.

With every new ReSharper release its fellow ReSharper Ultimate products receive updates as well. Below are the highlights of their latest changes.

ReSharper C++
C++ support in Visual Studio

ReSharper C++ makes Microsoft Visual Studio a better IDE with refactorings, navigation, code inspections, quick-fixes, code generation and more productivity features for C++ development.

ReSharper C++ extends Visual Studio with over 60 C++ code inspections that are displayed instantly, as you type. For many of these inspections, ReSharper C++ provides quick-fixes (light bulbs) to improve code in one way or another.

Visual Studio Extension for C++ Developers

ReSharper C++ currently supports C, C++03 and C++11 in Visual Studio 2010, 2012, 2013 and 2015.

Dominators sunburst chart

dotMemory 4.3 introduces Sunburst diagram. Just a quick look at the chart allows you to find out which objects are crucial for your application and evaluate the largest structures. The more memory a dominator retains, the larger the central angle.

Sunburst diagram in dotMemory 4.3
dotMemory Unit Framework

The new dotMemory Unit framework allows you to write tests that check your code for all kinds of memory issues. Extend your unit testing framework with the functionality of a memory profiler.

dotMemory Unit
SQL query profiling

SQL queries are now supported when profiling in Timeline mode, letting you analyze how each particular query affects application performance and which method runs the query.

SQL profiling in dotTrace 6.1
Timeline profiling

Timeline mode is perfect for analyzing UI freezes, sync delays, excessive garbage collections, file I/O, and other interval events. It is a completely new way of profiling applications based on collecting temporal data for the call stack and thread states in your application.


The latest dotCover 3.1 enhances support for MSTest and WinStore tests to cover solutions with MSTest DeploymentItem attributes, .runsettings and .testsettings configuration files, adds support for ReSharper 9.1, and more bug fixes.

Previous Versions

ReSharper 7
  • Support for Visual Studio 2012
  • New refactorings
  • Smoother code formatting
  • Easier code review
  • Members Hierarchy
  • CSS Style Hierarchy
  • Unit testing improvements
  • JavaScript support improvements
  • Improved naming style configuration
ReSharper 8
  • Support for Visual Studio 2013
  • Project dependency viewer
  • Faster code fixes
  • Multifile templates
  • Navigation improvements
  • Free command-line version of ReSharper
  • More code inspections and quick-fixes
  • New solution-wide refactorings
  • Extraordinary XAML support
  • More accessible code completion
  • CSS support improvements
  • Enhanced JavaScript support
  • Extension manager