diff --git a/AutoRest/Modelers/Swagger.Tests/AutoRest.Modeler.Swagger.Tests.csproj b/AutoRest/Modelers/Swagger.Tests/AutoRest.Modeler.Swagger.Tests.csproj
index ea2b011b5341a..dda50548a36da 100644
--- a/AutoRest/Modelers/Swagger.Tests/AutoRest.Modeler.Swagger.Tests.csproj
+++ b/AutoRest/Modelers/Swagger.Tests/AutoRest.Modeler.Swagger.Tests.csproj
@@ -36,9 +36,13 @@
       <DesignTime>True</DesignTime>
       <DependentUpon>Resources.resx</DependentUpon>
     </Compile>
+    <Compile Include="SwaggerModelerRedisTests.cs" />
     <Compile Include="SwaggerSpecHelper.cs" />
     <Compile Include="SwaggerModelerTests.cs" />
     <None Include="app.config" />
+    <None Include="Swagger\swagger-redis-sample.json">
+      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+    </None>
     <None Include="Swagger\swagger-allOf-circular.json">
       <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
     </None>
diff --git a/AutoRest/Modelers/Swagger.Tests/Swagger/swagger-redis-sample.json b/AutoRest/Modelers/Swagger.Tests/Swagger/swagger-redis-sample.json
new file mode 100644
index 0000000000000..bf80d0515b194
--- /dev/null
+++ b/AutoRest/Modelers/Swagger.Tests/Swagger/swagger-redis-sample.json
@@ -0,0 +1,683 @@
+{
+  "swagger": "2.0",
+  "info": {
+    "title": "RedisManagementClient",
+    "description": "REST API for Azure Redis Cache Service",
+    "version": "2016-04-01"
+  },
+  "host": "management.azure.com",
+  "schemes": [
+    "https"
+  ],
+  "consumes": [
+    "application/json",
+    "text/json"
+  ],
+  "produces": [
+    "application/json",
+    "text/json"
+  ],
+  "security": [
+    {
+      "azure_auth": [
+        "user_impersonation"
+      ]
+    }
+  ],
+  "securityDefinitions": {
+    "azure_auth": {
+      "type": "oauth2",
+      "authorizationUrl": "https://login.microsoftonline.com/common/oauth2/authorize",
+      "flow": "implicit",
+      "description": "Azure Active Directory OAuth2 Flow",
+      "scopes": {
+        "user_impersonation": "impersonate your user account"
+      }
+    }
+  },
+  "paths": {
+    "/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.Cache/Redis/{name}": {
+      "put": {
+        "tags": [
+          "Redis"
+        ],
+        "operationId": "Redis_CreateOrUpdate",
+        "description": "Create a redis cache, or replace (overwrite/recreate, with potential downtime) an existing cache",
+        "parameters": [
+          {
+            "name": "resourceGroupName",
+            "in": "path",
+            "required": true,
+            "type": "string",
+            "description": "The name of the resource group."
+          },
+          {
+            "name": "name",
+            "in": "path",
+            "required": true,
+            "type": "string",
+            "description": "The name of the redis cache."
+          },
+          {
+            "name": "parameters",
+            "in": "body",
+            "required": true,
+            "schema": {
+              "$ref": "#/definitions/RedisCreateOrUpdateParameters"
+            },
+            "description": "Parameters supplied to the CreateOrUpdate redis operation."
+          },
+          {
+            "$ref": "#/parameters/ApiVersionParameter"
+          },
+          {
+            "$ref": "#/parameters/SubscriptionIdParameter"
+          }
+        ],
+        "responses": {
+          "201": {
+            "description": "",
+            "schema": {
+              "$ref": "#/definitions/RedisResourceWithAccessKey"
+            }
+          },
+          "200": {
+            "description": "",
+            "schema": {
+              "$ref": "#/definitions/RedisResourceWithAccessKey"
+            }
+          }
+        }
+      },
+      "delete": {
+        "tags": [
+          "Redis"
+        ],
+        "operationId": "Redis_Delete",
+        "description": "Deletes a redis cache. This operation takes a while to complete.",
+        "parameters": [
+          {
+            "name": "resourceGroupName",
+            "in": "path",
+            "required": true,
+            "type": "string",
+            "description": "The name of the resource group."
+          },
+          {
+            "name": "name",
+            "in": "path",
+            "required": true,
+            "type": "string",
+            "description": "The name of the redis cache."
+          },
+          {
+            "$ref": "#/parameters/ApiVersionParameter"
+          },
+          {
+            "$ref": "#/parameters/SubscriptionIdParameter"
+          }
+        ],
+        "responses": {
+          "200": {
+            "description": ""
+          },
+          "204": {
+            "description": ""
+          }
+        }
+      },
+      "get": {
+        "tags": [
+          "Redis"
+        ],
+        "operationId": "Redis_Get",
+        "description": "Gets a redis cache (resource description).",
+        "parameters": [
+          {
+            "name": "resourceGroupName",
+            "in": "path",
+            "required": true,
+            "type": "string",
+            "description": "The name of the resource group."
+          },
+          {
+            "name": "name",
+            "in": "path",
+            "required": true,
+            "type": "string",
+            "description": "The name of the redis cache."
+          },
+          {
+            "$ref": "#/parameters/ApiVersionParameter"
+          },
+          {
+            "$ref": "#/parameters/SubscriptionIdParameter"
+          }
+        ],
+        "responses": {
+          "200": {
+            "description": "",
+            "schema": {
+              "$ref": "#/definitions/RedisResource"
+            }
+          }
+        }
+      }
+    },
+    "/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.Cache/Redis/": {
+      "get": {
+        "tags": [
+          "Redis"
+        ],
+        "operationId": "Redis_ListByResourceGroup",
+        "description": "Gets all redis caches in a resource group.",
+        "parameters": [
+          {
+            "name": "resourceGroupName",
+            "in": "path",
+            "required": true,
+            "type": "string",
+            "description": "The name of the resource group."
+          },
+          {
+            "$ref": "#/parameters/ApiVersionParameter"
+          },
+          {
+            "$ref": "#/parameters/SubscriptionIdParameter"
+          }
+        ],
+        "responses": {
+          "200": {
+            "description": "",
+            "schema": {
+              "$ref": "#/definitions/RedisListResult"
+            }
+          }
+        },
+        "x-ms-pageable": {
+          "nextLinkName": "nextLink"
+        }
+      }
+    },
+    "/subscriptions/{subscriptionId}/providers/Microsoft.Cache/Redis/": {
+      "get": {
+        "tags": [
+          "Redis"
+        ],
+        "operationId": "Redis_List",
+        "description": "Gets all redis caches in the specified subscription.",
+        "parameters": [
+          {
+            "$ref": "#/parameters/ApiVersionParameter"
+          },
+          {
+            "$ref": "#/parameters/SubscriptionIdParameter"
+          }
+        ],
+        "responses": {
+          "200": {
+            "description": "",
+            "schema": {
+              "$ref": "#/definitions/RedisListResult"
+            }
+          }
+        },
+        "x-ms-pageable": {
+            "nextLinkName": "nextLink"
+        }
+      }
+    },
+    "/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.Cache/Redis/{name}/listKeys": {
+      "post": {
+        "tags": [
+          "Redis"
+        ],
+        "operationId": "Redis_ListKeys",
+        "description": "Retrieve a redis cache's access keys. This operation requires write permission to the cache resource.",
+        "parameters": [
+          {
+            "name": "resourceGroupName",
+            "in": "path",
+            "required": true,
+            "type": "string",
+            "description": "The name of the resource group."
+          },
+          {
+            "name": "name",
+            "in": "path",
+            "required": true,
+            "type": "string",
+            "description": "The name of the redis cache."
+          },
+          {
+            "$ref": "#/parameters/ApiVersionParameter"
+          },
+          {
+            "$ref": "#/parameters/SubscriptionIdParameter"
+          }
+        ],
+        "responses": {
+          "200": {
+            "description": "Lists the keys for Redis Cache",
+            "schema": {
+              "$ref": "#/definitions/RedisListKeysResult"
+            }
+          }
+        }
+      }
+    },
+    "/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.Cache/Redis/{name}/regenerateKey": {
+      "post": {
+        "tags": [
+          "Redis"
+        ],
+        "operationId": "Redis_RegenerateKey",
+        "description": "Regenerate redis cache's access keys. This operation requires write permission to the cache resource.",
+        "parameters": [
+          {
+            "name": "resourceGroupName",
+            "in": "path",
+            "required": true,
+            "type": "string",
+            "description": "The name of the resource group."
+          },
+          {
+            "name": "name",
+            "in": "path",
+            "required": true,
+            "type": "string",
+            "description": "The name of the redis cache."
+          },
+          {
+            "name": "parameters",
+            "in": "body",
+            "required": true,
+            "schema": {
+              "$ref": "#/definitions/RedisRegenerateKeyParameters"
+            },
+            "description": "Specifies which key to reset."
+          },
+          {
+            "$ref": "#/parameters/ApiVersionParameter"
+          },
+          {
+            "$ref": "#/parameters/SubscriptionIdParameter"
+          }
+        ],
+        "responses": {
+          "200": {
+            "description": "Lists the regenerated keys for Redis Cache",
+            "schema": {
+              "$ref": "#/definitions/RedisListKeysResult"
+            }
+          }
+        }
+      }
+    },
+    "/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.Cache/Redis/{name}/forceReboot": {
+      "post": {
+        "tags": [
+          "Redis"
+        ],
+        "operationId": "Redis_ForceReboot",
+        "description": "Reboot specified redis node(s). This operation requires write permission to the cache resource. There can be potential data loss.",
+        "parameters": [
+          {
+            "name": "resourceGroupName",
+            "in": "path",
+            "required": true,
+            "type": "string",
+            "description": "The name of the resource group."
+          },
+          {
+            "name": "name",
+            "in": "path",
+            "required": true,
+            "type": "string",
+            "description": "The name of the redis cache."
+          },
+          {
+            "name": "parameters",
+            "in": "body",
+            "required": true,
+            "schema": {
+              "$ref": "#/definitions/RedisRebootParameters"
+            },
+            "description": "Specifies which redis node(s) to reboot."
+          },
+          {
+            "$ref": "#/parameters/ApiVersionParameter"
+          },
+          {
+            "$ref": "#/parameters/SubscriptionIdParameter"
+          }
+        ],
+        "responses": {
+          "200": {
+            "description": ""
+          },
+          "204": {
+            "description": ""
+          }
+        }
+      }
+    }
+  },
+  "definitions": {
+    "Sku": {
+      "properties": {
+        "name": {
+          "type": "string",
+          "description": "What type of redis cache to deploy. Valid values: (Basic, Standard, Premium)",
+          "enum": [
+            "Basic",
+            "Standard",
+            "Premium"
+          ],
+          "x-ms-enum": {
+            "name": "SkuName",
+            "modelAsString": true
+          }
+        },
+        "family": {
+          "type": "string",
+          "description": "Which family to use. Valid values: (C, P)",
+          "enum": [
+            "C",
+            "P"
+          ],
+          "x-ms-enum": {
+            "name": "SkuFamily",
+            "modelAsString": true
+          }
+        },
+        "capacity": {
+          "type": "integer",
+          "format": "int32",
+          "description": "What size of redis cache to deploy. Valid values: for C family (0, 1, 2, 3, 4, 5, 6), for P family (1, 2, 3, 4)"
+        }
+      },
+      "required": [
+        "name",
+        "family",
+        "capacity"
+      ],
+      "description": "Sku parameters supplied to the create redis operation."
+    },
+    "RedisProperties": {
+      "properties": {
+        "redisVersion": {
+          "type": "string",
+          "description": "RedisVersion parameter has been deprecated. As such, it is no longer necessary to provide this parameter and any value specified is ignored."
+        },
+        "sku": {
+          "$ref": "#/definitions/Sku",
+          "description": "What sku of redis cache to deploy."
+        },
+        "redisConfiguration": {
+          "type": "object",
+          "additionalProperties": {
+            "type": "string"
+          },
+          "description": "All Redis Settings. Few possible keys: rdb-backup-enabled,rdb-storage-connection-string,rdb-backup-frequency,maxmemory-delta,maxmemory-policy,notify-keyspace-events,maxmemory-samples,slowlog-log-slower-than,slowlog-max-len,list-max-ziplist-entries,list-max-ziplist-value,hash-max-ziplist-entries,hash-max-ziplist-value,set-max-intset-entries,zset-max-ziplist-entries,zset-max-ziplist-value etc."
+        },
+        "enableNonSslPort": {
+          "type": "boolean",
+          "description": "If the value is true, then the non-ssl redis server port (6379) will be enabled."
+        },
+        "tenantSettings": {
+          "type": "object",
+          "additionalProperties": {
+            "type": "string"
+          },
+          "description": "tenantSettings"
+        },
+        "shardCount": {
+          "type": "integer",
+          "format": "int32",
+          "description": "The number of shards to be created on a Premium Cluster Cache."
+        },
+        "subnetId": {
+          "type": "string",
+          "description": "The full resource ID of a subnet in a virtual network to deploy the redis cache in. Example format: /subscriptions/{subid}/resourceGroups/{resourceGroupName}/Microsoft.{Network|ClassicNetwork}/VirtualNetworks/vnet1/subnets/subnet1"
+        },
+        "staticIP": {
+          "type": "string",
+          "description": "Required when deploying a redis cache inside an existing Azure Virtual Network."
+        }
+      },
+      "required": [
+        "sku"
+      ],
+      "description": "Parameters supplied to CreateOrUpdate redis operation."
+    },
+    "Resource": {
+      "properties": {
+        "id": {
+          "readOnly": true,
+          "type": "string",
+          "description": "Resource Id"
+        },
+        "name": {
+          "readOnly": true,
+          "type": "string",
+          "description": "Resource name"
+        },
+        "type": {
+          "readOnly": true,
+          "type": "string",
+          "description": "Resource type"
+        },
+        "location": {
+          "type": "string",
+          "description": "Resource location"
+        },
+        "tags": {
+          "type": "object",
+          "additionalProperties": {
+            "type": "string"
+          },
+          "description": "Resource tags"
+        }
+      },
+      "required": [
+        "location"
+      ],
+      "x-ms-azure-resource": true
+    },
+    "RedisCreateOrUpdateParameters": {
+      "properties": {
+        "properties": {
+          "x-ms-client-flatten": true,
+          "$ref": "#/definitions/RedisProperties",
+          "description": "Redis cache properties."
+        }
+      },
+      "required": [
+        "properties"
+      ],
+      "allOf": [
+        {
+          "$ref": "#/definitions/Resource"
+        }
+      ],
+      "description": "Parameters supplied to the CreateOrUpdate Redis operation."
+    },
+    "RedisAccessKeys": {
+      "properties": {
+        "primaryKey": {
+          "type": "string",
+          "description": "The current primary key that clients can use to authenticate with redis cache."
+        },
+        "secondaryKey": {
+          "type": "string",
+          "description": "The current secondary key that clients can use to authenticate with redis cache."
+        }
+      },
+      "description": "Redis cache access keys."
+    },
+    "RedisReadableProperties": {
+      "properties": {
+        "provisioningState": {
+          "type": "string",
+          "description": "Redis instance provisioning status"
+        },
+        "hostName": {
+          "type": "string",
+          "description": "Redis host name"
+        },
+        "port": {
+          "type": "integer",
+          "format": "int32",
+          "description": "Redis non-ssl port"
+        },
+        "sslPort": {
+          "type": "integer",
+          "format": "int32",
+          "description": "Redis ssl port"
+        }
+      },
+      "allOf": [
+        {
+          "$ref": "#/definitions/RedisProperties"
+        }
+      ],
+      "description": "Parameters describing a redis instance"
+    },
+    "RedisReadablePropertiesWithAccessKey": {
+      "properties": {
+        "accessKeys": {
+          "$ref": "#/definitions/RedisAccessKeys",
+          "description": "Redis cache access keys."
+        }
+      },
+      "allOf": [
+        {
+          "$ref": "#/definitions/RedisReadableProperties"
+        }
+      ],
+      "description": "Properties generated only in response to CreateOrUpdate redis operation."
+    },
+    "RedisResourceWithAccessKey": {
+      "properties": {
+        "properties": {
+          "x-ms-client-flatten": true,
+          "$ref": "#/definitions/RedisReadablePropertiesWithAccessKey",
+          "description": "Redis cache properties"
+        }
+      },
+      "allOf": [
+        {
+          "$ref": "#/definitions/RedisResource"
+        }
+      ],
+      "description": "A redis item in CreateOrUpdate Operation response."
+    },
+    "RedisResource": {
+      "properties": {
+        "properties": {
+          "x-ms-client-flatten": true,
+          "$ref": "#/definitions/RedisReadableProperties",
+          "description": "Redis cache properties"
+        }
+      },
+      "allOf": [
+        {
+          "$ref": "#/definitions/Resource"
+        }
+      ],
+      "description": "A single redis item in List or Get Operation."
+    },
+    "RedisListResult": {
+      "properties": {
+        "value": {
+          "type": "array",
+          "items": {
+            "$ref": "#/definitions/RedisResource"
+          },
+          "description": "Results of the list operation"
+        },
+        "nextLink": {
+          "type": "string",
+          "description": "Link for next set of locations."
+        }
+      },
+      "description": "The response of list redis operation."
+    },
+    "RedisListKeysResult": {
+      "properties": {
+        "primaryKey": {
+          "type": "string",
+          "description": "The current primary key that clients can use to authenticate with redis cache."
+        },
+        "secondaryKey": {
+          "type": "string",
+          "description": "The current secondary key that clients can use to authenticate with redis cache."
+        }
+      },
+      "description": "The response of redis list keys operation."
+    },
+    "RedisRegenerateKeyParameters": {
+      "properties": {
+        "keyType": {
+          "type": "string",
+          "description": "Which redis access key to reset",
+          "enum": [
+            "Primary",
+            "Secondary"
+          ],
+          "x-ms-enum": {
+            "name": "RedisKeyType",
+            "modelAsString": false
+          }
+        }
+      },
+      "required": [
+        "keyType"
+      ],
+      "description": "Specifies which redis access keys to reset."
+    },
+    "RedisRebootParameters": {
+      "properties": {
+        "rebootType": {
+          "type": "string",
+          "description": "Which redis node(s) to reboot. Depending on this value data loss is possible.",
+          "enum": [
+            "PrimaryNode",
+            "SecondaryNode",
+            "AllNodes"
+          ],
+          "x-ms-enum": {
+            "name": "RebootType",
+            "modelAsString": false
+          }
+        },
+        "shardId": {
+          "type": "integer",
+          "format": "int32",
+          "description": "In case of cluster cache, this specifies shard id which should be rebooted."
+        }
+      },
+      "required": [
+        "rebootType"
+      ],
+      "description": "Specifies which redis node(s) to reboot."
+    }
+  },
+  "parameters": {
+    "SubscriptionIdParameter": {
+      "name": "subscriptionId",
+      "in": "path",
+      "required": true,
+      "type": "string",
+      "description": "Gets subscription credentials which uniquely identify Microsoft Azure subscription. The subscription ID forms part of the URI for every service call."
+    },
+    "ApiVersionParameter": {
+      "name": "api-version",
+      "in": "query",
+      "required": true,
+      "type": "string",
+      "description": "Client Api Version."
+    }
+  }
+}
\ No newline at end of file
diff --git a/AutoRest/Modelers/Swagger.Tests/SwaggerModelerRedisTests.cs b/AutoRest/Modelers/Swagger.Tests/SwaggerModelerRedisTests.cs
new file mode 100644
index 0000000000000..e19bd34e90a5f
--- /dev/null
+++ b/AutoRest/Modelers/Swagger.Tests/SwaggerModelerRedisTests.cs
@@ -0,0 +1,35 @@
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT License. See License.txt in the project root for license information.
+
+using System;
+using System.IO;
+using System.Linq;
+using System.Net;
+using Microsoft.Rest.Generator;
+using Microsoft.Rest.Generator.ClientModel;
+using Microsoft.Rest.Generator.CSharp;
+using Microsoft.Rest.Generator.Extensibility;
+using Microsoft.Rest.Generator.Utilities;
+using Xunit;
+using Newtonsoft.Json.Linq;
+
+namespace Microsoft.Rest.Modeler.Swagger.Tests
+{
+    [Collection("AutoRest Tests")]
+    public class SwaggerModelerRedisTests
+    {
+        [Fact]
+        public void RedisResponseWithAccessKeys_IsAssignableTo_RedisResponse()
+        {
+            Generator.Modeler modeler = new SwaggerModeler(new Settings
+            {
+                Namespace = "Test",
+                Input = Path.Combine("Swagger", "swagger-redis-sample.json")
+            });
+            var clientModel = modeler.Build();
+            var redisResponseModel = clientModel.ModelTypes.Single(x => x.Name == "RedisResource");
+            var redisResponseWithAccessKeyModel = clientModel.ModelTypes.Single(x => x.Name == "RedisResourceWithAccessKey");
+            Assert.Equal(redisResponseModel, redisResponseWithAccessKeyModel.BaseModelType);
+        }
+    }
+}
\ No newline at end of file
diff --git a/AutoRest/Modelers/Swagger/SchemaResolver.cs b/AutoRest/Modelers/Swagger/SchemaResolver.cs
index 092a8c145f6d4..6fbf3603c69ec 100644
--- a/AutoRest/Modelers/Swagger/SchemaResolver.cs
+++ b/AutoRest/Modelers/Swagger/SchemaResolver.cs
@@ -18,7 +18,6 @@ public class SchemaResolver : ICloneable
         private const int MaximumReferenceDepth = 40;
         private readonly SwaggerModeler _modeler;
         private readonly ServiceDefinition _serviceDefinition;
-        private readonly List<string> _visitedReferences;
 
         /// <summary>
         /// Create a new schema resolver in the context of the given swagger spec
@@ -33,7 +32,6 @@ public SchemaResolver(SwaggerModeler modeler)
 
             _modeler = modeler;
             _serviceDefinition = modeler.ServiceDefinition;
-            _visitedReferences = new List<string>();
         }
 
         /// <summary>
@@ -44,11 +42,6 @@ public SchemaResolver(SwaggerModeler modeler)
         public object Clone()
         {
             var resolver = new SchemaResolver(_modeler);
-            foreach (string reference in _visitedReferences)
-            {
-                resolver._visitedReferences.Add(reference);
-            }
-
             return resolver;
         }
 
@@ -201,12 +194,32 @@ private bool SchemaTypesAreEquivalent(Schema parentProperty,
             if ((parentProperty.Type == null || parentProperty.Type == DataType.Object) &&
                 (unwrappedProperty.Type == null || unwrappedProperty.Type == DataType.Object))
             {
-                if (!string.IsNullOrEmpty(parentProperty.Reference) ||
-                    !string.IsNullOrEmpty(unwrappedProperty.Reference))
+                var parentPropertyToCompare = parentProperty;
+                var unwrappedPropertyToCompare = unwrappedProperty;
+                if (!string.IsNullOrEmpty(parentProperty.Reference))
+                {
+                    parentPropertyToCompare = Dereference(parentProperty.Reference);
+                }
+                if (!string.IsNullOrEmpty(unwrappedProperty.Reference))
                 {
-                    return parentProperty.Reference == unwrappedProperty.Reference;
+                    unwrappedPropertyToCompare = Dereference(unwrappedProperty.Reference);
                 }
-                // do not compare inline schemas
+
+                if (parentPropertyToCompare == unwrappedPropertyToCompare)
+                {
+                    return true; // when fully dereferenced, they can refer to the same thing
+                }
+
+                // or they can refer to different things... but there can be an inheritance relation...
+                while (unwrappedPropertyToCompare != null && unwrappedPropertyToCompare.Extends != null)
+                {
+                    unwrappedPropertyToCompare = Dereference(unwrappedPropertyToCompare.Extends);
+                    if (unwrappedPropertyToCompare == parentPropertyToCompare)
+                    {
+                        return true;
+                    }
+                }
+
                 return false;
             }
             if (parentProperty.Type == DataType.Array &&
@@ -252,6 +265,12 @@ private Schema FindParentProperty(string parentReference, string propertyName)
         /// <param name="referencePath">The schema reference to dereference.</param>
         /// <returns>The dereferenced schema.</returns>
         private Schema Dereference(string referencePath)
+        {
+            var vistedReferences = new List<string>();
+            return DereferenceInner(referencePath, vistedReferences);
+        }
+
+        private Schema DereferenceInner(string referencePath, List<string> visitedReferences)
         {
             // Check if external reference
             string[] splitReference = referencePath.Split(new[] {'#'}, StringSplitOptions.RemoveEmptyEntries);
@@ -260,17 +279,17 @@ private Schema Dereference(string referencePath)
                 referencePath = "#" + splitReference[1];
             }
 
-            if (_visitedReferences.Contains(referencePath.ToLower(CultureInfo.InvariantCulture)))
+            if (visitedReferences.Contains(referencePath.ToLower(CultureInfo.InvariantCulture)))
             {
                 throw new ArgumentException(string.Format(CultureInfo.InvariantCulture, 
                     Properties.Resources.CircularReference, referencePath));
             }
 
-            if (_visitedReferences.Count >= MaximumReferenceDepth)
+            if (visitedReferences.Count >= MaximumReferenceDepth)
             {
                 throw new ArgumentException(Properties.Resources.ExceededMaximumReferenceDepth, referencePath);
             }
-            _visitedReferences.Add(referencePath.ToLower(CultureInfo.InvariantCulture));
+            visitedReferences.Add(referencePath.ToLower(CultureInfo.InvariantCulture));
             var definitions = _serviceDefinition.Definitions;
             if (definitions == null || !definitions.ContainsKey(referencePath.StripDefinitionPath()))
             {
@@ -282,7 +301,7 @@ private Schema Dereference(string referencePath)
             var schema = _serviceDefinition.Definitions[referencePath.StripDefinitionPath()];
             if (schema.Reference != null)
             {
-                schema = Dereference(schema.Reference);
+                schema = DereferenceInner(schema.Reference, visitedReferences);
             }
 
             return schema;