Added comments (#178)

Author: hristo.h

src/MyTested.AspNetCore.Mvc.ModelState/Builders/Contracts/Models/IModelStateBuilder.cs

@@ -7,10 +7,26 @@
     /// </summary>
     public interface IModelStateBuilder
     {
+        /// <summary>
+        /// Adds an error to the built <see cref="Microsoft.AspNetCore.Mvc.ModelBinding.ModelStateDictionary"/>
+        /// </summary>
+        /// <param name="key">Key to set as string.</param>
+        /// <param name="errorMessage">Error message to set as string.</param>
+        /// <returns></returns>
         IAndModelStateBuilder WithError(string key, string errorMessage);
 
+        /// <summary>
+        /// Adds model state entries to the built <see cref="Microsoft.AspNetCore.Mvc.ModelBinding.ModelStateDictionary"/>
+        /// </summary>
+        /// <param name="errors">Model state entries as dictionary.</param>
+        /// <returns></returns>
         IAndModelStateBuilder WithErrors(IDictionary<string, string> errors);
 
-        IAndModelStateBuilder WithErrors(object erros);
+        /// <summary>
+        /// Adds model state entries to the built <see cref="Microsoft.AspNetCore.Mvc.ModelBinding.ModelStateDictionary"/>
+        /// </summary>
+        /// <param name="errors">Model state entries as anonymous object.</param>
+        /// <returns></returns>
+        IAndModelStateBuilder WithErrors(object errors);
     }
 }

src/MyTested.AspNetCore.Mvc.ModelState/Builders/Models/ModelStateBuilder.cs

@@ -2,34 +2,48 @@
 {
     using System.Collections.Generic;
     using Microsoft.AspNetCore.Mvc.ModelBinding;
+    using Microsoft.AspNetCore.Routing;
     using MyTested.AspNetCore.Mvc.Builders.Contracts.Models;
     using MyTested.AspNetCore.Mvc.Internal.TestContexts;
     using MyTested.AspNetCore.Mvc.Utilities.Extensions;
 
+    /// <summary>
+    /// Used for building <see cref="ModelStateDictionary"/>
+    /// </summary>
     public class ModelStateBuilder : IAndModelStateBuilder
     {
+        /// <summary>
+        /// Initializes a new instance of the <see cref="ModelStateBuilder"/> class.
+        /// </summary>
+        /// <param name="actionContext"><see cref="ModelStateDictionary"/> to build.</param>
         public ModelStateBuilder(ActionTestContext actionContext) 
             => this.ModelState = actionContext.ModelState;
 
+        /// <summary>
+        /// Gets the <see cref="ModelStateDictionary"/>
+        /// </summary>
+        /// <value>The built <see cref="ModelStateDictionary"/></value>
         protected ModelStateDictionary ModelState { get; set; }
 
+        /// <inheritdoc />
         public IAndModelStateBuilder WithError(string key, string errorMessage)
         {
             this.AddError(key, errorMessage);
             return this;
         }
 
+        /// <inheritdoc />
         public IAndModelStateBuilder WithErrors(IDictionary<string, string> errors)
         {
             errors.ForEach(err => this.AddError(err.Key, err.Value));
             return this;
         }
 
-        public IAndModelStateBuilder WithErrors(object erros)
-        {
-            return this;
-        }
+        /// <inheritdoc />
+        public IAndModelStateBuilder WithErrors(object errors)
+            => this.WithErrors(new RouteValueDictionary(errors));
 
+        /// <inheritdoc />
         public IModelStateBuilder AndAlso() => this;
 
         private void AddError(string key, string errorMessage) => this.ModelState.AddModelError(key, errorMessage);