Made config an optional parameter

Removed  unnecessary internal modifiers

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;

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

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"/>

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

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;
         }
     }
 }

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

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

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