Coding Assistance

Syntax Highlighting

ReSharper extends the default highlighting support of Visual Studio with highlighting for fields, local variables, types, and more, in both C# and VB.NET. For example, the Syntax Highlighting feature allows you to easily distinguish between local variables and fields in your code. To switch on ReSharper's highlighting, choose ReSharper | Options | Code Inspection | Settings and select Color Identifiers.

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Context Actions

Context actions are intended for local code transformations that you may want to perform in a certain context. ReSharper automatically indicates when one or more context actions are available at the current caret position with the yellow light bulb to the left of the code line. Context actions are applied just like quick-fixes. You can either click the bulb or press Alt+Enter, and then select an appropriate action.

You can enable or disable specific context actions for C#, VB.NET, or XML in the ReSharper Options dialog box.

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Code Completion

ReSharper complements and extends Visual Studio's native code completion (IntelliSense) with more advanced capabilities. For example, it narrows down the list of suggestions based on your typing, automatically imports selected types and extension methods, adds parentheses when completing method names, suggests variable and field names depending on their types, and so on.

In ReSharper 4.0, all three completion features support CamelHumps — that is, you can complete any item by entering only its uppercase characters.

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Symbol Completion

Use Ctrl+Space for completing C# variables and methods, currently visible type names, C# keywords, and more. ReSharper can also automatically suggest prefixes when declaring identifiers, according to your coding guidelines.
For ASP.NET files, ReSharper provides code completion for web control properties and events, data sources, content placeholders, and of course for C# and VB.NET code.
In XAML, Symbol Completion helps completing references to resources, whereas in build scripts, ReSharper lets you complete names of properties, targets, tasks, and attributes that are available within the current scope.

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Smart Completion

Smart Code Completion, invoked with Ctrl+Shift+Space, filters the list of methods (functions in VB.NET), fields or variables to match the expected type of an expression. For example, when you use Smart Completion for method call arguments, the list of suggested values is narrowed down only to the required parameter type. Smart Completion can also suggest creating anonymous delegates, lambda expressions, and regular methods, as well as local variables for out parameters.
Smart Completion works like a charm in XAML event handlers and other positions.

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Import Symbol Completion

Import Symbol Completion (formerly Type Name Completion) is invoked with Ctrl+Alt+Space. Unlike Symbol Completion (which only completes types accessible at the current location), ReSharper displays all types that match a specified prefix regardless of what namespace they belong to, and automatically adds the appropriate namespace import directives when necessary. In C# 3.0 code files, Import Symbol Completion works after dot with extension methods and puts necessary using directives.
Import Symbol Completion in very helpful in XAML markup for tag names. Namespace import directives are also inserted as required.

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Complete Statement

Complete Statement, introduced in ReSharper 4.0, is a feature that inserts necessary syntax elements (braces, semicolons etc.) and gets you to the position to start the next statement, saving you from excessive juggling with the caret. As you work, keep in mind the default shortcut for this
feature — Ctrl+Shift+Enter.

Complete Statement (also known as Smart Enter) comes to rescue in numerous scenarios, including auto-closing parentheses, adding semicolons, completing if, while and for statements, and so on.

For example, whenever you declare a new method, Complete Statement comes handy after specifying method parameters:

If you press Ctrl+Shift+Enter at this point, ReSharper will automatically insert a closing parenthesis, as well as both braces, and put the caret right where you can proceed with writing the method body:

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Parameter Info

This part of Visual Studio's IntelliSense is also extended in ReSharper. When you call a method (procedure), Parameter Info shows you all available method signatures and parameters with relevant documentation (the tooltip appears automatically while you type, or you can display it by pressing Ctrl+P). While you are adding new arguments, ReSharper grays out any signatures that become incompatible.

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Highlight Matching Delimiters

In C#, whenever you place the caret immediately before/after a closing parenthesis/bracket/brace, the matching opening character is highlighted, and vice versa (this option is configurable).
In VB.NET, the matching Sub or Function is highlighted when the caret is placed anywhere within or after End Sub or End Function. The matching keyword and its line are highlighted whenever you place the caret within the opening keyword (again, you can fine-tune this feature).
In XML, matching tags are unobtrusively highlighted, letting you see the tag structure.
If a matching piece of code scrolls off the screen, an appropriate pop-up appears for your convenience.

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Importing Namespaces

When a type name cannot be resolved because you forgot to issue the corresponding namespace import directive in the source code, a small pop-up appears to suggest one or more types to import. Simply press Alt+Enter, and the appropriate namespace import directive will be inserted automatically. Also, you will not lose your current caret position.

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Auto-insertion of Delimiters

When you type (, [, ", or ' in the editor, a paired character is inserted automatically (whenever appropriate). This feature may be easily switched off, but you shouldn't be afraid of inserting too many closing parentheses, brackets, or quotes by mistake: if the closing parenthesis or quote already exists, ReSharper will not add the second one.
In XML, as soon as you type an opening quote or bracket, the closing one appears automatically.

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Code Reordering

ReSharper allows you to quickly change the order of code elements with the press of a key — well, four keys: Ctrl+Shift+Alt+Up/Down/Left/Right. In particular, you can move members up and down, reorder method parameters, move statements within a block, move statements out of or into a block, move XML tags up and down, as well as XML attributes left and right.

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Quick Documentation

To see the documentation for a certain class, method/function or other symbol right in the editor, position the caret on the symbol name and press Ctrl+Q. The documentation shows in a pop-up window with clickable links to other resources.

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Comment/Uncomment Code

Promptly comment or uncomment any block of C# or VB.NET code by selecting it in the editor and pressing Ctrl+/ (for line comment) or Ctrl+Shift+/ (for block comments in C#).
You can also use Ctrl+/ to quickly comment or uncomment the line of code where the caret is located in the editor if no block code has been selected. In the same circumstances, pressing Ctrl+Shift+/ inserts the opening block comment (/*) and the closing block comment (*/) immediately before and immediately after the caret position, or removes them if the caret is positioned inside the commented code block. You can also use this feature to insert comments in XML and XAML files.

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Highlight Current Line

You can opt to highlight the line where the caret currently resides with a color. Just select Hightlight current line in the Editor tab of the ReSharper Options dialog box:

You can configure the color of the highlight in the Fonts and Colors tab of the Visual Studio Options dialog box (Tools | Options ).

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Extend/Shrink Selection

The Extend Selection feature helps successively select expanding blocks of code. That is, you can easily select any expression in the code by placing the caret somewhere inside it and pressing Ctrl+W a few times. Shrink Selection works in the opposite way and can be applied by pressing Ctrl+Shift+W.

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Duplicate Line or Selection

Quickly duplicate any line (block) of code by placing the caret at this line in the editor (or, respectively, selecting the desired block) and pressing Ctrl+D.

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Multiple Entries Clipboard

ReSharper provides a special Paste command that launches the Multiple Entries Clipboard window. It contains references to recent clipboard items, each marked with a figure or letter, which you can easily select between.

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