diff --git a/GraphQL-Core/CSharpClassBuilder.cs b/GraphQL-Core/CSharpClassBuilder.cs
index 914b30a..4da16fd 100644
--- a/GraphQL-Core/CSharpClassBuilder.cs
+++ b/GraphQL-Core/CSharpClassBuilder.cs
@@ -10,7 +10,7 @@ namespace GraphQLCore
     /// <summary>
     /// Responsible for dynamically creating C# classes to wrap instances of GenericType{T}
     /// </summary>
-    internal static class GraphQLCoreTypeWrapperGenerator
+    public static class GraphQLCoreTypeWrapperGenerator
     {
         internal static AssemblyBuilder asmBuilder = AssemblyBuilder.DefineDynamicAssembly(CreateDynamicAssemblyName(), AssemblyBuilderAccess.Run);
         internal static ModuleBuilder mdBuilder = null;
diff --git a/GraphQL-Core/Extensions/GraphQLExtensions.cs b/GraphQL-Core/Extensions/GraphQLExtensions.cs
index ca5214d..de817cf 100644
--- a/GraphQL-Core/Extensions/GraphQLExtensions.cs
+++ b/GraphQL-Core/Extensions/GraphQLExtensions.cs
@@ -10,7 +10,7 @@ namespace GraphQLCore.Extensions
     /// <summary>
     /// Contains extension methods for GraphQLCore
     /// </summary>
-    internal static class GraphQLExtensions
+    public static class GraphQLExtensions
     {
         /// <summary>
         /// Given a C# Type instance that represents a value type, enumeration, or class, returns the appropriate GraphQL.NET Type
diff --git a/GraphQL-Core/Extensions/ReflectionExtensions.cs b/GraphQL-Core/Extensions/ReflectionExtensions.cs
index 0a7371b..2cdd262 100644
--- a/GraphQL-Core/Extensions/ReflectionExtensions.cs
+++ b/GraphQL-Core/Extensions/ReflectionExtensions.cs
@@ -9,7 +9,7 @@ namespace GraphQLCore.Extensions
     /// <summary>
     /// Extensions necessary when performing reflection-based logic in GraphQLCore
     /// </summary>
-    internal static class ReflectionExtensions
+    public static class ReflectionExtensions
     {
         /// <summary>
         /// Detects whether a given type, <paramref name="t"/>, implements the given interface, <paramref name="i"/>
diff --git a/GraphQL-Core/GraphQLBuilder.cs b/GraphQL-Core/GraphQLBuilder.cs
index fdd3b83..d53f54a 100644
--- a/GraphQL-Core/GraphQLBuilder.cs
+++ b/GraphQL-Core/GraphQLBuilder.cs
@@ -123,7 +123,7 @@ public class GraphQLBuilder : IGraphQLBuilder
         /// <summary>
         /// Defaulted to null
         /// </summary>
-        internal StitchedQuery Schema { get; set; }
+        public StitchedQuery Schema { get; set; }
 
         /// <summary>
         /// Defaulted to null
diff --git a/GraphQL-Core/GraphQLMiddleware.cs b/GraphQL-Core/GraphQLMiddleware.cs
index 66fed6d..829990d 100644
--- a/GraphQL-Core/GraphQLMiddleware.cs
+++ b/GraphQL-Core/GraphQLMiddleware.cs
@@ -16,16 +16,22 @@ public static class GraphQLMiddleware
         /// <param name="services"></param>
         /// <param name="config"></param>
         /// <returns>An instance of IGraphQLBuilder that can be used to add types, queries, etc.</returns>
-        public static IGraphQLBuilder AddGraphQL(this IServiceCollection services, Expression<Func<IGraphQLBuilder, IGraphQLBuilder>> config)
+        public static IGraphQLBuilder AddGraphQL(this IServiceCollection services, Expression<Func<IGraphQLBuilder, IGraphQLBuilder>> config = null)
         {
             var builder = new GraphQLBuilder(services);
 
-            config
-                .Compile()
-                (builder)
-                .Build();
+            if(config != null)
+            {
+                config
+                    .Compile()
+                    (builder)
+                    .Build();
 
-            return builder;
+                return null;
+            }
+                
+            else
+                return builder;
         }
     }
 }
diff --git a/GraphQL-Core/Queries/Queries.cs b/GraphQL-Core/Queries/Queries.cs
index 4b3098b..99fe614 100644
--- a/GraphQL-Core/Queries/Queries.cs
+++ b/GraphQL-Core/Queries/Queries.cs
@@ -12,7 +12,7 @@ public interface IGraphQLGenericQuery { }
     /// <summary>
     /// 
     /// </summary>
-    internal class StitchedQuery : ObjectGraphType
+    public class StitchedQuery : ObjectGraphType
     {
         /// <summary>
         /// List of resolved fields
@@ -35,7 +35,7 @@ public void Build()
     /// A user-defined query that acts as a container until the query is supplied to a StitchedQuery instance
     /// </summary>
     /// <typeparam name="T">The return type of the query</typeparam>
-    internal class GenericQuery<T> : ObjectGraphType, IGraphQLGenericQuery
+    public class GenericQuery<T> : ObjectGraphType, IGraphQLGenericQuery
     {
         /// <summary>
         /// An instance of StitchedQuery that will received the proxy query
diff --git a/GraphQL-Core/Resolvers/Resolvers.cs b/GraphQL-Core/Resolvers/Resolvers.cs
index 17c0c7b..aadbeda 100644
--- a/GraphQL-Core/Resolvers/Resolvers.cs
+++ b/GraphQL-Core/Resolvers/Resolvers.cs
@@ -7,7 +7,7 @@ namespace GraphQLCore.Resolvers
     /// <summary>
     /// Interface for a generic field resolver
     /// </summary>
-    internal interface IGenericFieldResolver
+    public interface IGenericFieldResolver
     {
         /// <summary>
         /// When called, returns an instance of FieldType that can be added to any ObjectGraphType
diff --git a/GraphQL-Core/Schemas/Schemas.cs b/GraphQL-Core/Schemas/Schemas.cs
index 0d2df38..966248a 100644
--- a/GraphQL-Core/Schemas/Schemas.cs
+++ b/GraphQL-Core/Schemas/Schemas.cs
@@ -12,7 +12,7 @@ internal interface IGraphQLGenericSchema { }
     /// <summary>
     /// Schema which will be used to combine all user-provided queries
     /// </summary>
-    internal class SuperSchema : Schema, IGraphQLGenericSchema
+    public class SuperSchema : Schema, IGraphQLGenericSchema
     {
         /// <summary>
         /// Creates a new GraphQL Schema-node using the provided dependency resolver