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C#

C# static code analysis

Unique rules to find Bugs, Vulnerabilities, Security Hotspots, and Code Smells in your C# code

  • All rules 493
  • Vulnerability46
  • Bug88
  • Security Hotspot24
  • Code Smell335

  • Quick Fix 61
Filtered: 8 rules found
async-await
    Impact
      Clean code attribute
        1. Awaitable method should be used

           Code Smell
        2. Calls to "async" methods should not be blocking in Azure Functions

           Code Smell
        3. "ValueTask" should be consumed correctly

           Code Smell
        4. Non-async "Task/Task<T>" methods should not return null

           Bug
        5. Calls to "async" methods should not be blocking

           Code Smell
        6. Parameter validation in "async"/"await" methods should be wrapped

           Code Smell
        7. "ConfigureAwait(false)" should be used

           Code Smell
        8. "async" methods should not return "void"

           Bug

        "ConfigureAwait(false)" should be used

        intentionality - complete
        maintainability
        Code Smell
        • multi-threading
        • async-await
        • suspicious
        • performance

        Why is this an issue?

        After an awaited Task has executed, you can continue execution in the original, calling thread or any arbitrary thread. Unless the rest of the code needs the context from which the Task was spawned, Task.ConfigureAwait(false) should be used to keep execution in the Task thread to avoid the need for context switching and the possibility of deadlocks.

        This rule raises an issue when code in a class library targeting .Net Framework awaits a Task and continues execution in the original calling thread.

        The rule does not raise for .Net Core libraries as there is no SynchronizationContext in .Net Core.

        Noncompliant code example

        var response = await httpClient.GetAsync(url);  // Noncompliant
        

        Compliant solution

        var response = await httpClient.GetAsync(url).ConfigureAwait(false);
        
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