Doc comment on items

src/Discord.Net.Commands/CommandServiceConfig.cs

@@ -21,8 +21,10 @@ namespace Discord.Commands
         /// <summary> Determines whether extra parameters should be ignored. </summary>
         public bool IgnoreExtraArgs { get; set; } = false;
 
-        public IServiceProvider ServiceProvider { get; set; }
+        /// <summary> Gets or sets the <see cref="IServiceProvider"/> to use. </summary>
+        public IServiceProvider ServiceProvider { get; set; } = null;
 
-        public Func<CommandService, IServiceProvider> ServiceProviderFactory { get; set; }
+        /// <summary> Gets or sets a factory function for the <see cref="IServiceProvider"/> to use. </summary>
+        public Func<CommandService, IServiceProvider> ServiceProviderFactory { get; set; } = null;
     }
 }