Code inspection: Return value of a method annotated with [MustDisposeResource] is never disposed

If you are using the [MustDisposeResourceAttribute] from JetBrains.Annotations to enforce resource disposal in the calling code, JetBrains Rider reports cases where there is a variable initialized with a constructor or a factory method returning a disposable resource, and that variable is not handled properly.

To avoid an incorrect handling of the disposable resource, JetBrains Rider suggests converting variable declaration into a using declaration or a using block:

            
    [MustDisposeResource]
    public class HasNativeResources : IDisposable
    {
        private IDisposable _resource;

        public void Dispose()
        {
            _resource.Dispose();
        }

    }

    public class Test
    {
        public Test()
        {
            var resource =
                new HasNativeResources();
        }
    }
    
        

            
    [MustDisposeResource]
    public class HasNativeResources : IDisposable
    {
        private IDisposable _resource;

        public void Dispose()
        {
            _resource.Dispose();
        }

    }

    public class Test
    {
        public Test()
        {
            using var resource =
                new HasNativeResources();
        }
    }
    
        

Last modified: 08 April 2024