Add overloaded WithHeaders extension supporting IEnumerables

src/Nancy/ResponseExtensions.cs

@@ -143,6 +143,30 @@ public static Response WithHeaders(this Response response, params Tuple<string,
             return response;
         }
 
+        /// <summary>
+        /// Adds headers to the response using anonymous types
+        /// </summary>
+        /// Enumerable of headers - each header should be a Tuple with two string elements
+        /// for header name and header value
+        /// </param>
+        /// <returns>Modified response</returns>
+        public static Response WithHeaders(this Response response, IEnumerable<Tuple<string, string>> headers)
+        {
+            return response.WithHeaders(headers.ToArray());
+        }
+
+        /// <summary>
+        /// Adds headers to the response using anonymous types
+        /// </summary>
+        /// Enumerable of headers - each header should be a Tuple with two string elements
+        /// for header name and header value
+        /// </param>
+        /// <returns>Modified response</returns>
+        public static Response WithHeaders(this Response response, IEnumerable<object> headers)
+        {
+            return response.WithHeaders(headers.ToArray());
+        }
+
         /// <summary>
         /// Sets the content type of the response
         /// </summary>

test/Nancy.Tests/Unit/ResponseExtensionsFixture.cs

@@ -133,6 +133,40 @@ public void Should_be_able_to_supply_withHeaders_headers_as_anonymous_types()
             result.Headers["test2"].ShouldEqual("test2value");
         }
 
+        [Fact]
+        public void Should_be_able_to_add_headers_as_enumerable()
+        {
+            var headers = new List<Tuple<string, string>>
+            {
+                new Tuple<string, string>("test", "testvalue"),
+                new Tuple<string, string>("test2", "test2value")
+            };
+
+            var response = new Response();
+            var result = response.WithHeaders(headers);
+
+            result.Headers.ShouldNotBeNull();
+            result.Headers["test"].ShouldEqual("testvalue");
+            result.Headers["test2"].ShouldEqual("test2value");
+        }
+
+        [Fact]
+        public void Should_be_able_to_add_headers_as_enumerable_of_anonymous()
+        {
+            var headers = new List<object>
+            {
+                new { Header = "test", Value = "testvalue" },
+                new { Header = "test2", Value = "test2value" }
+            };
+
+            var response = new Response();
+            var result = response.WithHeaders(headers);
+
+            result.Headers.ShouldNotBeNull();
+            result.Headers["test"].ShouldEqual("testvalue");
+            result.Headers["test2"].ShouldEqual("test2value");
+        }
+
         [Fact]
         public void Should_be_able_to_chain_setting_single_headers()
         {
@@ -193,4 +227,4 @@ private string GetFilePath()
 #endif
         }
     }
-}
+}