diff --git a/modules/swagger-codegen/src/main/resources/csharp/model.mustache b/modules/swagger-codegen/src/main/resources/csharp/model.mustache
index c95d2f1a1b9..7ab48dc56e2 100644
--- a/modules/swagger-codegen/src/main/resources/csharp/model.mustache
+++ b/modules/swagger-codegen/src/main/resources/csharp/model.mustache
@@ -1,4 +1,5 @@
 using System;
+using System.Linq;
 using System.IO;
 using System.Text;
 using System.Collections;
@@ -72,12 +73,17 @@ namespace {{packageName}}.Model
             if (other == null)
                 return false;
 
-            return {{#vars}}
+            return {{#vars}}{{#isNotContainer}}
                 (
                     this.{{name}} == other.{{name}} ||
                     this.{{name}} != null &&
                     this.{{name}}.Equals(other.{{name}})
-                ){{#hasMore}} && {{/hasMore}}{{/vars}};
+                ){{#hasMore}} && {{/hasMore}}{{/isNotContainer}}{{^isNotContainer}}
+                (
+                    this.{{name}} == other.{{name}} ||
+                    this.{{name}} != null &&
+                    this.{{name}}.SequenceEqual(other.{{name}})
+                ){{#hasMore}} && {{/hasMore}}{{/isNotContainer}}{{/vars}};
         }
 
         /// <summary>
diff --git a/samples/client/petstore/csharp/SwaggerClientTest/Lib/SwaggerClient/src/main/csharp/IO/Swagger/Model/Category.cs b/samples/client/petstore/csharp/SwaggerClientTest/Lib/SwaggerClient/src/main/csharp/IO/Swagger/Model/Category.cs
index 6b39196b2b7..7d3f0936dce 100644
--- a/samples/client/petstore/csharp/SwaggerClientTest/Lib/SwaggerClient/src/main/csharp/IO/Swagger/Model/Category.cs
+++ b/samples/client/petstore/csharp/SwaggerClientTest/Lib/SwaggerClient/src/main/csharp/IO/Swagger/Model/Category.cs
@@ -1,4 +1,5 @@
 using System;
+using System.Linq;
 using System.IO;
 using System.Text;
 using System.Collections;
diff --git a/samples/client/petstore/csharp/SwaggerClientTest/Lib/SwaggerClient/src/main/csharp/IO/Swagger/Model/Order.cs b/samples/client/petstore/csharp/SwaggerClientTest/Lib/SwaggerClient/src/main/csharp/IO/Swagger/Model/Order.cs
index 8346e1cc6d8..1f786769d55 100644
--- a/samples/client/petstore/csharp/SwaggerClientTest/Lib/SwaggerClient/src/main/csharp/IO/Swagger/Model/Order.cs
+++ b/samples/client/petstore/csharp/SwaggerClientTest/Lib/SwaggerClient/src/main/csharp/IO/Swagger/Model/Order.cs
@@ -1,4 +1,5 @@
 using System;
+using System.Linq;
 using System.IO;
 using System.Text;
 using System.Collections;
diff --git a/samples/client/petstore/csharp/SwaggerClientTest/Lib/SwaggerClient/src/main/csharp/IO/Swagger/Model/Pet.cs b/samples/client/petstore/csharp/SwaggerClientTest/Lib/SwaggerClient/src/main/csharp/IO/Swagger/Model/Pet.cs
index 3c5264fe8c8..d85d8a8be7e 100644
--- a/samples/client/petstore/csharp/SwaggerClientTest/Lib/SwaggerClient/src/main/csharp/IO/Swagger/Model/Pet.cs
+++ b/samples/client/petstore/csharp/SwaggerClientTest/Lib/SwaggerClient/src/main/csharp/IO/Swagger/Model/Pet.cs
@@ -1,4 +1,5 @@
 using System;
+using System.Linq;
 using System.IO;
 using System.Text;
 using System.Collections;
@@ -126,15 +127,15 @@ namespace IO.Swagger.Model
                     this.Name != null &&
                     this.Name.Equals(other.Name)
                 ) && 
-//                (
-//                    this.PhotoUrls == other.PhotoUrls ||
-//                    this.PhotoUrls != null &&
-//                    this.PhotoUrls.Equals(other.PhotoUrls)
-//                ) && 
+                (
+                    this.PhotoUrls == other.PhotoUrls ||
+                    this.PhotoUrls != null &&
+                    this.PhotoUrls.SequenceEqual(other.PhotoUrls)
+                ) && 
                 (
                     this.Tags == other.Tags ||
                     this.Tags != null &&
-                    this.Tags.Equals(other.Tags)
+                    this.Tags.SequenceEqual(other.Tags)
                 ) && 
                 (
                     this.Status == other.Status ||
diff --git a/samples/client/petstore/csharp/SwaggerClientTest/Lib/SwaggerClient/src/main/csharp/IO/Swagger/Model/Tag.cs b/samples/client/petstore/csharp/SwaggerClientTest/Lib/SwaggerClient/src/main/csharp/IO/Swagger/Model/Tag.cs
index 6e8f84b89e9..8b2cbe08474 100644
--- a/samples/client/petstore/csharp/SwaggerClientTest/Lib/SwaggerClient/src/main/csharp/IO/Swagger/Model/Tag.cs
+++ b/samples/client/petstore/csharp/SwaggerClientTest/Lib/SwaggerClient/src/main/csharp/IO/Swagger/Model/Tag.cs
@@ -1,4 +1,5 @@
 using System;
+using System.Linq;
 using System.IO;
 using System.Text;
 using System.Collections;
diff --git a/samples/client/petstore/csharp/SwaggerClientTest/Lib/SwaggerClient/src/main/csharp/IO/Swagger/Model/User.cs b/samples/client/petstore/csharp/SwaggerClientTest/Lib/SwaggerClient/src/main/csharp/IO/Swagger/Model/User.cs
index aff43555136..d2c1e3a46eb 100644
--- a/samples/client/petstore/csharp/SwaggerClientTest/Lib/SwaggerClient/src/main/csharp/IO/Swagger/Model/User.cs
+++ b/samples/client/petstore/csharp/SwaggerClientTest/Lib/SwaggerClient/src/main/csharp/IO/Swagger/Model/User.cs
@@ -1,4 +1,5 @@
 using System;
+using System.Linq;
 using System.IO;
 using System.Text;
 using System.Collections;
diff --git a/samples/client/petstore/csharp/SwaggerClientTest/SwaggerClientTest.userprefs b/samples/client/petstore/csharp/SwaggerClientTest/SwaggerClientTest.userprefs
index 31e5cba141b..05585bff932 100644
--- a/samples/client/petstore/csharp/SwaggerClientTest/SwaggerClientTest.userprefs
+++ b/samples/client/petstore/csharp/SwaggerClientTest/SwaggerClientTest.userprefs
@@ -2,8 +2,25 @@
   <MonoDevelop.Ide.Workspace ActiveConfiguration="Debug" />
   <MonoDevelop.Ide.Workbench ActiveDocument="TestPet.cs">
     <Files>
-      <File FileName="TestPet.cs" Line="11" Column="2" />
+      <File FileName="TestPet.cs" Line="8" Column="25" />
     </Files>
+    <Pads>
+      <Pad Id="MonoDevelop.NUnit.TestPad">
+        <State name="__root__">
+          <Node name="SwaggerClientTest" expanded="True">
+            <Node name="SwaggerClientTest" expanded="True">
+              <Node name="SwaggerClient" expanded="True">
+                <Node name="TestPet" expanded="True">
+                  <Node name="TestPet" expanded="True">
+                    <Node name="TestEqual" selected="True" />
+                  </Node>
+                </Node>
+              </Node>
+            </Node>
+          </Node>
+        </State>
+      </Pad>
+    </Pads>
   </MonoDevelop.Ide.Workbench>
   <MonoDevelop.Ide.DebuggingService.Breakpoints>
     <BreakpointStore />
diff --git a/samples/client/petstore/csharp/SwaggerClientTest/TestPet.cs b/samples/client/petstore/csharp/SwaggerClientTest/TestPet.cs
index 6fe0de92cac..0227a2d9113 100644
--- a/samples/client/petstore/csharp/SwaggerClientTest/TestPet.cs
+++ b/samples/client/petstore/csharp/SwaggerClientTest/TestPet.cs
@@ -1,5 +1,6 @@
 using NUnit.Framework;
 using System;
+using System.Linq;
 using System.IO;
 using System.Collections.Generic;
 using IO.Swagger.Api;
@@ -166,7 +167,7 @@ namespace SwaggerClient.TestPet
 			p1.Category = category1;
 			p1.PhotoUrls = photoUrls1;
 
-			// create pet
+			// create pet 2
 			Pet p2 = new Pet();
 			p2.Id = petId;
 			p2.Name = "Csharp test";
@@ -185,9 +186,25 @@ namespace SwaggerClient.TestPet
 			p2.Category = category2;
 			p2.PhotoUrls = photoUrls2;
 
+			// p1 and p2 should be equal (both object and attribute level)
 			Assert.IsTrue (category1.Equals (category2));
-			Assert.IsTrue (tag1.Equals (tag2));
-			Assert.IsTrue (p1.Equals(p2));
+			Assert.IsTrue (tags1.SequenceEqual (tags2));
+			Assert.IsTrue (p1.PhotoUrls.SequenceEqual(p2.PhotoUrls));
+
+			Assert.IsTrue (p1.Equals (p2));
+
+			// update attribute to that p1 and p2 are not equal
+			category2.Name = "new category name";
+			Assert.IsFalse(category1.Equals (category2));
+
+			tags2 = new List<Tag> ();
+			Assert.IsFalse (tags1.SequenceEqual (tags2));
+
+			// photoUrls has not changed so it should be equal
+			Assert.IsTrue (p1.PhotoUrls.SequenceEqual(p2.PhotoUrls));
+
+			Assert.IsFalse (p1.Equals (p2));
+
 		}
 
 	}
diff --git a/samples/client/petstore/csharp/SwaggerClientTest/bin/Debug/SwaggerClientTest.dll b/samples/client/petstore/csharp/SwaggerClientTest/bin/Debug/SwaggerClientTest.dll
index 5e020c8b222..924934c4623 100755
Binary files a/samples/client/petstore/csharp/SwaggerClientTest/bin/Debug/SwaggerClientTest.dll and b/samples/client/petstore/csharp/SwaggerClientTest/bin/Debug/SwaggerClientTest.dll differ
diff --git a/samples/client/petstore/csharp/SwaggerClientTest/bin/Debug/SwaggerClientTest.dll.mdb b/samples/client/petstore/csharp/SwaggerClientTest/bin/Debug/SwaggerClientTest.dll.mdb
index 915a2952654..d0d7f1b3ccf 100644
Binary files a/samples/client/petstore/csharp/SwaggerClientTest/bin/Debug/SwaggerClientTest.dll.mdb and b/samples/client/petstore/csharp/SwaggerClientTest/bin/Debug/SwaggerClientTest.dll.mdb differ
diff --git a/samples/client/petstore/csharp/SwaggerClientTest/obj/Debug/SwaggerClientTest.dll b/samples/client/petstore/csharp/SwaggerClientTest/obj/Debug/SwaggerClientTest.dll
index 5e020c8b222..924934c4623 100755
Binary files a/samples/client/petstore/csharp/SwaggerClientTest/obj/Debug/SwaggerClientTest.dll and b/samples/client/petstore/csharp/SwaggerClientTest/obj/Debug/SwaggerClientTest.dll differ
diff --git a/samples/client/petstore/csharp/SwaggerClientTest/obj/Debug/SwaggerClientTest.dll.mdb b/samples/client/petstore/csharp/SwaggerClientTest/obj/Debug/SwaggerClientTest.dll.mdb
index 915a2952654..d0d7f1b3ccf 100644
Binary files a/samples/client/petstore/csharp/SwaggerClientTest/obj/Debug/SwaggerClientTest.dll.mdb and b/samples/client/petstore/csharp/SwaggerClientTest/obj/Debug/SwaggerClientTest.dll.mdb differ