JetBrains Rider 2017.3 Help

Typing Assistance

In addition to saving your time by providing smart suggestions in completion lists, JetBrains Rider provides other typing assistance features, which let you create and edit your code even faster.

Auto-Inserting Matching Delimiters

By default, whenever you type an opening delimiter (, [, ", or ', a paired character is inserted automatically (whenever appropriate). If you change your mind and press Backspace to delete an opening delimiter, its closing pair is also deleted. If the pairing closing delimiter already exists, JetBrains Rider will not add another one. The matching symbols are inserted according to your formatting preferences.

Regarding braces {}, JetBrains Rider can provide a closing brace immediately on typing the opening one, or on pressing Enter.

If necessary, you can change the default behavior. To do so, go to the Environment | Editor | Editor Behavior page of JetBrains Rider options and use the controls in the Braces and Parentheses section.

Correcting Length/Count mistyping

JetBrains Rider prevents you from stumbling over mistyped Length/Count properties of arrays/collections. As soon as you erroneously start typing the Count property for a usage of an array, JetBrains Rider will allow you to pick it from the completion list and replace with the Length property, which you probably meant to type.

Completing mistyped Count property for array

In a similar way, it will help you call the Count property on a collection usage when you start typing the Length property by mistake.

Completing mistyped Length property for collection

The correct property will be there as soon as you accept the completion suggestion:

void Foo(int[] array, List<int> collection) { if(array.Length == collection.Count }

Generating equality and flag checks for enumeration types

When you need to compare a value of enum type to one of the members of this enum, just type a dot and then pick the desired enum member in the completion list:

Completing enum members to produce equality/flag checks

JetBrains Rider will generate the comparison for you:

public enum Direction { North, East, South, West } void Turn(Direction whereTo) { if(whereTo == Direction.South }

Creating type parameter from usage in method parameters

When creating generic methods, you can easily add type parameters by typing T for a new parameter and choosing the corresponding item in the completion list

Creating type parameter from usage in method parameters

JetBrains Rider will add a new type parameter to the method declaration and bring you to a position where you can type the name of the type parameter in both its declaration and usage:

Creating type parameter from usage in method parameters

After you finish typing the name, press Enter or Tab to go on typing.

Making block comments multiline on Enter

If you write a multiline block comment (/*....*/), you can type the opening part /*, then write the first line, and the just hit Enter in the end of the line — JetBrains Rider will insert the closing part */.

Additionally, JetBrains Rider will insert the asterisk * in the beginning of each line of a block comment as you press Enter. This behavior is enabled by default, but you can turn it off by clearing the Insert * on Enter after /* check box on the Editor | General | Typing Assistance page of JetBrains Rider settings (Ctrl+Alt+S).

Last modified: 16 January 2018

See Also