dotnet/roslyn

IDE0059 is not always reported

Open

#52,292 opened on Mar 31, 2021

View on GitHub
 (5 comments) (2 reactions) (0 assignees)C# (4,257 forks)batch import
Area-IDEConcept-Continuous ImprovementFeature - IDE0059help wanted

Repository metrics

Stars
 (20,414 stars)
PR merge metrics
 (Avg merge 6d 17h) (256 merged PRs in 30d)

Description

Version Used:

  • .NET 5.0

Code to Reproduce:

    public class TestUnusedVariable
    {
        public void TestUnusedVariableInTrySection()
        {
            try
            {
                var unusedVariable = new object();
            }
            catch { }
        }

        public void TestUnusedVariableWhenUsingSelect()
        {
            var unusedVariable = new object();

            Enumerable.Empty<object>().Select(x => x);
        }

        public void TestUnusedVariableWhenUsingWhere()
        {
            var unusedVariable = new object();

            Enumerable.Empty<object>().Where(_ => true);
        }
    }

Expected Behavior: Warning "IDE0059: Remove unnecessary value assignment" should be reported for each unusedVariable in the code above.

Actual Behavior: Warning "IDE0059" is not reported.

Contributor guide