System.Serializable attribute gone in Windows 10 UWP apps?

You need to use the following Attributes:

Mark the class with

[DataContract]

and mark properties with

[DataMember]

or

[IgnoreDataMember]

For example:

[DataContract]public class Foo{    [DataMember]    public string Bar { get; set; }    [IgnoreDataMember]    public string FizzBuzz { get; set; }}

As code above from Lance McCarthy:

[DataContract]public class Foo{    [DataMember]    public string SomeText { get; set; }    // ....    [IgnoreDataMember]    public string FizzBuzz { get; set; }}

In addition you can use my own extension (!!! Change MemoryStream to FileStream if you need to save it to file instead of to string):

public static class Extensions{    public static string Serialize<T>(this T obj)    {        var ms = new MemoryStream();        // Write an object to the Stream and leave it opened        using (var writer = XmlDictionaryWriter.CreateTextWriter(ms, Encoding.UTF8, ownsStream: false))        {            var ser = new DataContractSerializer(typeof(T));            ser.WriteObject(writer, obj);        }        // Read serialized string from Stream and close it        using (var reader = new StreamReader(ms, Encoding.UTF8))        {            ms.Position = 0;            return reader.ReadToEnd();        }    }    public static T Deserialize<T>(this string xml)    {        var ms = new MemoryStream();        // Write xml content to the Stream and leave it opened        using (var writer = new StreamWriter(ms, Encoding.UTF8, 512, leaveOpen: true))        {            writer.Write(xml);            writer.Flush();            ms.Position = 0;        }        // Read Stream to the Serializer and Deserialize and close it        using (var reader = XmlDictionaryReader.CreateTextReader(ms, Encoding.UTF8, new XmlDictionaryReaderQuotas(), null))        {            var ser = new DataContractSerializer(typeof(T));            return (T)ser.ReadObject(reader);        }    }}

and then just use those extentions:

[TestClass]public class UnitTest1{    [TestMethod]    public void TestSerializer()    {        var obj = new Foo()        {            SomeText = "Sample String",            SomeNumber = 135,            SomeDate = DateTime.Now,            SomeBool = true,        };        // Try to serialize to string        string xml = obj.Serialize();        // Try to deserialize from string        var newObj = xml.Deserialize<Foo>();        Assert.AreEqual(obj.SomeText, newObj.SomeText);        Assert.AreEqual(obj.SomeNumber, newObj.SomeNumber);        Assert.AreEqual(obj.SomeDate, newObj.SomeDate);        Assert.AreEqual(obj.SomeBool, newObj.SomeBool);    }}

Good luck mate.

There is a trick,

You can override the Class definition of this two missing references:

System.SerializableAttributeSystem.ComponentModel.DesignerCategoryAttribute

Here the code:

namespace System{    internal class SerializableAttribute : Attribute    {    }}namespace System.ComponentModel{    internal class DesignerCategoryAttribute : Attribute    {        public DesignerCategoryAttribute(string _) { }    }}