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Showing content from https://github.com/SonarSource/sonar-dotnet/issues/6912 below:

Unused fields in class with StructLayout · Issue #6912 · SonarSource/sonar-dotnet · GitHub

When class has StructLayout, we need all its props for memory allocation.

For example

public class Foo {

public void Bar(){

  var netResource = new NetResource
  {
                Scope = ResourceScope.GlobalNetwork,
                ResourceType = ResourceType.Disk,
                DisplayType = ResourceDisplaytype.Share,
                RemoteName = "foo"
  };

  _ = WNetAddConnection2(netResource, "pass", "user", 0);

}

        [DllImport("mpr.dll")]
        private static extern int WNetAddConnection2(NetResource netResource, string password, string username, int flags);

        [StructLayout(LayoutKind.Sequential)]
        private struct NetResource
        {
            public ResourceScope Scope;
            public ResourceType ResourceType;
            public ResourceDisplaytype DisplayType;
            public int Usage;
            public string LocalName;
            public string RemoteName;
            public string Comment;
            public string Provider;
        }
}

no issue

S1144 on not used props of NetResource struct

SonarAnalyzer.CSharp 8.54.0.64047

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