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 3813bde45f0..29e4208fb75 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
@@ -20,13 +20,13 @@ namespace IO.Swagger.Model
         /// <summary>
         /// Gets or Sets Id
         /// </summary>
-        [DataMember(Name="id", EmitDefaultValue=false)]
+        [DataMember(Name="id", EmitDefaultValue=true)]
         public long? Id { get; set; }
     
         /// <summary>
         /// Gets or Sets Name
         /// </summary>
-        [DataMember(Name="name", EmitDefaultValue=false)]
+        [DataMember(Name="name", EmitDefaultValue=true)]
         public string Name { get; set; }
     
         /// <summary>
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 54ce43ab83f..47494e8f029 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
@@ -33,37 +33,37 @@ namespace IO.Swagger.Model
         /// Order Status
         /// </summary>
         /// <value>Order Status</value>
-        [DataMember(Name="status", EmitDefaultValue=false)]
+        [DataMember(Name="status", EmitDefaultValue=true)]
         public StatusEnum Status { get; set; }
     
         /// <summary>
         /// Gets or Sets Id
         /// </summary>
-        [DataMember(Name="id", EmitDefaultValue=false)]
+        [DataMember(Name="id", EmitDefaultValue=true)]
         public long? Id { get; set; }
     
         /// <summary>
         /// Gets or Sets PetId
         /// </summary>
-        [DataMember(Name="petId", EmitDefaultValue=false)]
+        [DataMember(Name="petId", EmitDefaultValue=true)]
         public long? PetId { get; set; }
     
         /// <summary>
         /// Gets or Sets Quantity
         /// </summary>
-        [DataMember(Name="quantity", EmitDefaultValue=false)]
+        [DataMember(Name="quantity", EmitDefaultValue=true)]
         public int? Quantity { get; set; }
     
         /// <summary>
         /// Gets or Sets ShipDate
         /// </summary>
-        [DataMember(Name="shipDate", EmitDefaultValue=false)]
+        [DataMember(Name="shipDate", EmitDefaultValue=true)]
         public DateTime? ShipDate { get; set; }
     
         /// <summary>
         /// Gets or Sets Complete
         /// </summary>
-        [DataMember(Name="complete", EmitDefaultValue=false)]
+        [DataMember(Name="complete", EmitDefaultValue=true)]
         public bool? Complete { get; set; }
     
         /// <summary>
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 f3987aa5286..8daa0687386 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
@@ -33,37 +33,37 @@ namespace IO.Swagger.Model
         /// pet status in the store
         /// </summary>
         /// <value>pet status in the store</value>
-        [DataMember(Name="status", EmitDefaultValue=false)]
+        [DataMember(Name="status", EmitDefaultValue=true)]
         public StatusEnum Status { get; set; }
     
         /// <summary>
         /// Gets or Sets Id
         /// </summary>
-        [DataMember(Name="id", EmitDefaultValue=false)]
+        [DataMember(Name="id", EmitDefaultValue=true)]
         public long? Id { get; set; }
     
         /// <summary>
         /// Gets or Sets Category
         /// </summary>
-        [DataMember(Name="category", EmitDefaultValue=false)]
+        [DataMember(Name="category", EmitDefaultValue=true)]
         public Category Category { get; set; }
     
         /// <summary>
         /// Gets or Sets Name
         /// </summary>
-        [DataMember(Name="name", EmitDefaultValue=false)]
+        [DataMember(Name="name", EmitDefaultValue=true)]
         public string Name { get; set; }
     
         /// <summary>
         /// Gets or Sets PhotoUrls
         /// </summary>
-        [DataMember(Name="photoUrls", EmitDefaultValue=false)]
+        [DataMember(Name="photoUrls", EmitDefaultValue=true)]
         public List<string> PhotoUrls { get; set; }
     
         /// <summary>
         /// Gets or Sets Tags
         /// </summary>
-        [DataMember(Name="tags", EmitDefaultValue=false)]
+        [DataMember(Name="tags", EmitDefaultValue=true)]
         public List<Tag> Tags { get; set; }
     
         /// <summary>
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 3553578a083..566b9230334 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
@@ -20,13 +20,13 @@ namespace IO.Swagger.Model
         /// <summary>
         /// Gets or Sets Id
         /// </summary>
-        [DataMember(Name="id", EmitDefaultValue=false)]
+        [DataMember(Name="id", EmitDefaultValue=true)]
         public long? Id { get; set; }
     
         /// <summary>
         /// Gets or Sets Name
         /// </summary>
-        [DataMember(Name="name", EmitDefaultValue=false)]
+        [DataMember(Name="name", EmitDefaultValue=true)]
         public string Name { get; set; }
     
         /// <summary>
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 bfd2ffc411e..cc4d969d78c 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
@@ -20,50 +20,50 @@ namespace IO.Swagger.Model
         /// <summary>
         /// Gets or Sets Id
         /// </summary>
-        [DataMember(Name="id", EmitDefaultValue=false)]
+        [DataMember(Name="id", EmitDefaultValue=true)]
         public long? Id { get; set; }
     
         /// <summary>
         /// Gets or Sets Username
         /// </summary>
-        [DataMember(Name="username", EmitDefaultValue=false)]
+        [DataMember(Name="username", EmitDefaultValue=true)]
         public string Username { get; set; }
     
         /// <summary>
         /// Gets or Sets FirstName
         /// </summary>
-        [DataMember(Name="firstName", EmitDefaultValue=false)]
+        [DataMember(Name="firstName", EmitDefaultValue=true)]
         public string FirstName { get; set; }
     
         /// <summary>
         /// Gets or Sets LastName
         /// </summary>
-        [DataMember(Name="lastName", EmitDefaultValue=false)]
+        [DataMember(Name="lastName", EmitDefaultValue=true)]
         public string LastName { get; set; }
     
         /// <summary>
         /// Gets or Sets Email
         /// </summary>
-        [DataMember(Name="email", EmitDefaultValue=false)]
+        [DataMember(Name="email", EmitDefaultValue=true)]
         public string Email { get; set; }
     
         /// <summary>
         /// Gets or Sets Password
         /// </summary>
-        [DataMember(Name="password", EmitDefaultValue=false)]
+        [DataMember(Name="password", EmitDefaultValue=true)]
         public string Password { get; set; }
     
         /// <summary>
         /// Gets or Sets Phone
         /// </summary>
-        [DataMember(Name="phone", EmitDefaultValue=false)]
+        [DataMember(Name="phone", EmitDefaultValue=true)]
         public string Phone { get; set; }
     
         /// <summary>
         /// User Status
         /// </summary>
         /// <value>User Status</value>
-        [DataMember(Name="userStatus", EmitDefaultValue=false)]
+        [DataMember(Name="userStatus", EmitDefaultValue=true)]
         public int? UserStatus { get; set; }
     
         /// <summary>