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function Model(){    
    this.selectedItems = ko.observableArray();
    this.selectNone = function () {
        this.selectedItems().length = 0;   
        this.selectedItems.valueHasMutated();
    }
    this.hasItemsSelected = ko.dependentObservable(function () {
        return this.selectedItems().length > 0;
    }, this);
}

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html {
    background: #f6f6f6;
    padding: 24px;
    text-align: center;
}

a {
    border-radius: 4px;
    display: inline-block;

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html {
    background: #f6f6f6;
    padding: 24px;
    text-align: center;
}

a {
    border-radius: 4px;
    display: inline-block;

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img {
position: relative;
display: block;
content: "";
}

img:before {
display: block;
content: "";
position: absolute;

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var settings =  new JsonSerializerSettings
{
    ContractResolver = new ConfigurableContractResolver()
}
JsonSerializer serializer = JsonSerializer.Create(settings);
serializer.Serialize(textWriter, valueToSerialize);

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using System;
using System.Globalization;
using Newtonsoft.Json;
using Newtonsoft.Json.Serialization;

namespace MvcJson
{
    public class ConfigurableContractResolver: DefaultContractResolver
    {
        public bool UseCamelCase { get; set; }

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.border {
  border: 1px solid #ccc;
  border: 1px solid rgba(0, 0, 0, 0.15);
  -webkit-border-radius: 4px;
     -moz-border-radius: 4px;
          border-radius: 4px;
}

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// Data (like the default JsonResult) is the Model being serialized.
Type type = this.Data.GetType();
// Wrap Enumerables to avoid potential Json Hijacking.
if (TypeHelper.TryWrappingForIEnumerableGenericOrSame(ref type))
{
    this.Data = TypeHelper.GetTypeRemappingConstructor(type).Invoke(new object[] { this.Data });
}

using (JsonTextWriter jsonTextWriter = new JsonTextWriter(response.Output) { CloseOutput = false })
{

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using System;
using System.Collections.Generic;
using System.Linq;

namespace MvcJson.Net.Models
{
    public class EnumerableWrapper<T>
    {
        public EnumerableWrapper(IEnumerable<T> items)
        {

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/// <summary>
/// Creates a System.Web.Mvc.JsonResult object that serializes the specified object to JavaScript Object Notation (JSON).
/// </summary>
/// <param name="data">The JavaScript object graph to serialize.</param>
/// <param name="contentType">The content type (MIME type).</param>
/// <param name="contentEncoding">The content encoding.</param>
/// <param name="behavior">The JSON request behavior</param>
/// <returns>
/// The JSON result object that serializes the specified object to JSON format.
/// The result object that is prepared by this method is written to the response