Simplify interpolation (IDE0071)

Property Value
Rule ID IDE0071
Title Simplify interpolation
Category Style
Subcategory Language rules (expression-level preferences)
Applicable languages C# 6.0+ and Visual Basic 14+
Options dotnet_style_prefer_simplified_interpolation

Overview

This style rule concerns with simplification of interpolated strings to improve code readability. It recommends removal of certain explicit method calls, such as ToString(), when the same method would be implicitly invoked by the compiler if the explicit method call is removed.

Options

Options specify the behavior that you want the rule to enforce. For information about configuring options, see Option format.

dotnet_style_prefer_simplified_interpolation

Property Value Description
Option name dotnet_style_prefer_simplified_interpolation
Option values true Prefer simplified interpolated strings
false Do not prefer simplified interpolated strings
Default option value true
// dotnet_style_prefer_simplified_interpolation = true
var str = $"prefix {someValue} suffix";

// dotnet_style_prefer_simplified_interpolation = false
var str = $"prefix {someValue.ToString()} suffix";
 ' dotnet_style_prefer_simplified_interpolation = true
Dim str = $"prefix {someValue} suffix"

' dotnet_style_prefer_simplified_interpolation = false
Dim str = $"prefix {someValue.ToString()} suffix"

Suppress a warning

If you want to suppress only a single violation, add preprocessor directives to your source file to disable and then re-enable the rule.

#pragma warning disable IDE0071
// The code that's violating the rule is on this line.
#pragma warning restore IDE0071

To disable the rule for a file, folder, or project, set its severity to none in the configuration file.

[*.{cs,vb}]
dotnet_diagnostic.IDE0071.severity = none

To disable all of the code-style rules, set the severity for the category Style to none in the configuration file.

[*.{cs,vb}]
dotnet_analyzer_diagnostic.category-Style.severity = none

For more information, see How to suppress code analysis warnings.

See also