NET SDK ensures that you automatically get the analyzer bug fixes and new analyzers as soon as you update the SDK. NET SDK instead of installing the NuGet package, when possible. It is recommended that you enable these analyzers from the. See How to: Configure the scope of live code analysis.įirst party analyzers also ship inside the. You can configure the scope of live code analysis to execute for the current document only, all open documents, or the entire solution. You can configure the severity of analyzer rules, or diagnostics, in an EditorConfig file or from the light bulb menu.Īnalyzers can also be configured to inspect code at build time and live as you type. For information about these code fixes, see Common Quick Actions. Code fixes are shown in the light bulb icon menu along with other types of Quick Actions. Many analyzer rules, or diagnostics, have one or more associated code fixes that you can apply to correct the rule violation. The following image shows three violations-one error (red squiggle), one warning (green squiggle), and one suggestion (three grey dots): Analyzer violations also show up in the code editor as squiggles under the offending code. The analyzer violations reported in the error list match the severity level setting of the rule. If rule violations are found by an analyzer, they're reported in the code editor as a squiggle under the offending code and in the Error List window. To determine what the default value for a rule is, look in the Properties window.Ĭorresponds to the default severity of the rule. The diagnostic is reported to the IDE diagnostic engine, however.Ĭorresponds to the default severity of the rule. Offending code is underlined with gray squiggle and marked by small gray box in the scroll bar. Violations appear as Messages in the Error List, and not at all in command-line build output. Offending code is underlined with green squiggle and marked by small green box in the scroll bar. Violations appear as Warnings in the Error List and in command-line build output, but don't cause builds to fail. Offending code is underlined with red squiggle and marked by small red box in the scroll bar. Violations appear as Errors in the Error List and in command-line build output, and cause builds to fail. You can install external analyzers such as StyleCop, Roslynator, XUnit Analyzers, and Sonar Analyzer as a NuGet package or a Visual Studio extension.Įach analyzer has one of the following severity levels: Severity (Solution Explorer) The analyzer's diagnostic ID, or code format is CAxxxx, for example, CA1822. NET source code analysis.Ĭode quality analyzers are now included with the. NET SDK and can be strictly enforced as build warnings or errors. NET 5.0, code style analyzers are included with the. You can configure preferences in the text editor options page or in an EditorConfig file. The analyzer's diagnostic ID, or code format is IDExxxx, for example, IDE0001. This inspection or analysis happens during design time in all open files.Īnalyzers are divided into the following groups:Ĭode style analyzers are built into Visual Studio. NET Compiler Platform (Roslyn) Analyzers inspect your C# or Visual Basic code for style, quality, maintainability, design, and other issues. Quick-fixes to resolve code issues in C#, VB.NET, ASP.Applies to: Visual Studio Visual Studio for Mac Visual Studio Code On-the-fly design-time code analysis for C# and VB.NETĪll supported languages (including JavaScript, TypeScript, HTML and more.)Ģ30 code analysis rules (code inspections)ĭesign-time error highlighting: Compiler errors for C#, VB.NET, JavaScript, TypeScript and C++ĭesign-time error highlighting: most compiler errors, many possible runtime errors (such as detection of possible null reference exceptions) for all supported languagesġ00+ quick actions to resolve code issues in C# and VB.NET
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