public IEnumerable GetRules()

in src/Microsoft.Azure.WebJobs.Host/Bindings/BindingProviders/BindToStreamBindingProvider.cs [71:133]
58 lines of code
6 McCabe index (conditional complexity)

        public IEnumerable<BindingRule> GetRules()
        {
            var accessProp = typeof(TAttribute).GetProperty("access", BindingFlags.Instance | BindingFlags.Public | BindingFlags.IgnoreCase);

            foreach (var type in new Type[]
            {
                typeof(Stream),
            })
            {
                yield return new BindingRule
                {
                    SourceAttribute = typeof(TAttribute),
                    Filter = FilterNode.NotNull(accessProp), // For stream, Must specify Read vs. Write
                    UserType = OpenType.FromType(type)
                };
            }

            // Read 
            foreach (var filter in new FilterNode[]
            {
                FilterNode.IsEqual(accessProp, FileAccess.Read),
                FilterNode.Null(accessProp) // Not write 
            })
            {
                foreach (var type in new Type[]
                {
                typeof(TextReader),
                typeof(string),
                typeof(byte[])
                })
                {
                    yield return new BindingRule
                    {
                        Filter = filter,
                        SourceAttribute = typeof(TAttribute),
                        UserType = OpenType.FromType(type)
                    };
                }
            }

            // Write 
            foreach (var filter in new FilterNode[]
            {
                FilterNode.IsEqual(accessProp, FileAccess.Write),
                FilterNode.Null(accessProp) // Not Read
            })
            {
                foreach (var type in new Type[]
                {
                    typeof(TextWriter),
                    typeof(string).MakeByRefType(),
                    typeof(byte[]).MakeByRefType()
                })
                {
                    yield return new BindingRule
                    {
                        Filter = filter,
                        SourceAttribute = typeof(TAttribute),
                        UserType = OpenType.FromType(type)
                    };
                }
            }
        }