Removed class restriction to allow working with records (#13)

Co-authored-by: Miguel <miguel.zapata@quantumit.com.au>

Author: MigueZS

src/GraphQL.Query.Builder/IQueryOf{T}.cs

@@ -1,11 +1,11 @@
-using System;
+using System;
 using System.Collections.Generic;
 using System.Linq.Expressions;
 
 namespace GraphQL.Query.Builder
 {
     /// <summary>Query of TSource interface.</summary>
-    public interface IQuery<TSource> : IQuery where TSource : class
+    public interface IQuery<TSource> : IQuery
     {
         /// <summary>Gets the select list.</summary>
         List<object> SelectList { get; }

src/GraphQL.Query.Builder/IQueryStringBuilder.cs

@@ -1,4 +1,4 @@
-using System;
+using System;
 
 namespace GraphQL.Query.Builder
 {
@@ -11,6 +11,6 @@ public interface IQueryStringBuilder
         /// <summary>Builds the query.</summary>
         /// <param name="query">The query.</param>
         /// <returns>The GraphQL query as string, without outer enclosing block.</returns>
-        string Build<TSource>(IQuery<TSource> query) where TSource : class;
+        string Build<TSource>(IQuery<TSource> query);
     }
 }

src/GraphQL.Query.Builder/QueryOf{T}.cs

@@ -1,4 +1,4 @@
-using System;
+using System;
 using System.Collections.Generic;
 using System.Linq.Expressions;
 using System.Reflection;
@@ -10,7 +10,7 @@
 namespace GraphQL.Query.Builder
 {
     /// <summary>The query class.</summary>
-    public class Query<TSource> : IQuery<TSource> where TSource : class
+    public class Query<TSource> : IQuery<TSource>
     {
         private readonly QueryOptions options;
 

src/GraphQL.Query.Builder/QueryStringBuilder.cs

@@ -103,7 +103,7 @@ internal protected string FormatQueryParam(object value)
 
         /// <summary>Adds query params to the query string.</summary>
         /// <param name="query">The query.</param>
-        internal protected void AddParams<TSource>(IQuery<TSource> query) where TSource : class
+        internal protected void AddParams<TSource>(IQuery<TSource> query)
         {
             Guard.Argument(query, nameof(query)).NotNull();
 
@@ -121,7 +121,7 @@ internal protected void AddParams<TSource>(IQuery<TSource> query) where TSource
         /// <summary>Adds fields to the query sting.</summary>
         /// <param name="query">The query.</param>
         /// <exception cref="ArgumentException">Invalid Object in Field List</exception>
-        internal protected void AddFields<TSource>(IQuery<TSource> query) where TSource : class
+        internal protected void AddFields<TSource>(IQuery<TSource> query)
         {
             foreach (object item in query.SelectList)
             {
@@ -149,7 +149,7 @@ internal protected void AddFields<TSource>(IQuery<TSource> query) where TSource
         /// <summary>Builds the query.</summary>
         /// <param name="query">The query.</param>
         /// <returns>The GraphQL query as string, without outer enclosing block.</returns>
-        public string Build<TSource>(IQuery<TSource> query) where TSource : class
+        public string Build<TSource>(IQuery<TSource> query)
         {
             if (!String.IsNullOrWhiteSpace(query.AliasName))
             {