-Fixed serializing nullable collections

Src/Newtonsoft.Json.Tests/Issues/Issue1512.cs

@@ -0,0 +1,78 @@
+#region License
+// Copyright (c) 2007 James Newton-King
+//
+// Permission is hereby granted, free of charge, to any person
+// obtaining a copy of this software and associated documentation
+// files (the "Software"), to deal in the Software without
+// restriction, including without limitation the rights to use,
+// copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the
+// Software is furnished to do so, subject to the following
+// conditions:
+//
+// The above copyright notice and this permission notice shall be
+// included in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+// OTHER DEALINGS IN THE SOFTWARE.
+#endregion
+
+#if !(NET20 || NET35 || NET40)
+using System;
+using System.Collections.Immutable;
+#if DNXCORE50
+using System.Reflection;
+using Xunit;
+using Test = Xunit.FactAttribute;
+using Assert = Newtonsoft.Json.Tests.XUnitAssert;
+#else
+using NUnit.Framework;
+#endif
+
+namespace Newtonsoft.Json.Tests.Issues
+{
+    [TestFixture]
+    public class Issue1512 : TestFixtureBase
+    {
+        [Test]
+        public void Test()
+        {
+            var json = @"[
+                            {
+                                ""Inners"": []
+                            }
+                        ]";
+            ImmutableArray<Outer> result = JsonConvert.DeserializeObject<ImmutableArray<Outer>>(json);
+
+            Assert.AreEqual(1, result.Length);
+            Assert.AreEqual(0, result[0].Inners.Value.Length);
+        }
+    }
+
+    public sealed class Outer
+    {
+        public Outer(ImmutableArray<string>? inners)
+        {
+            this.Inners = inners;
+        }
+
+        public ImmutableArray<string>? Inners { get; }
+    }
+
+    public sealed class Inner
+    {
+        public Inner(string id)
+        {
+            this.Id = id;
+        }
+
+        public string Id { get; }
+    }
+}
+#endif

Src/Newtonsoft.Json/Serialization/DefaultContractResolver.cs

@@ -1179,7 +1179,7 @@ namespace Newtonsoft.Json.Serialization
 
             if (typeof(IEnumerable).IsAssignableFrom(t))
             {
-                return CreateArrayContract(objectType);
+                return CreateArrayContract(t);
             }
 
             if (CanConvertToString(t))