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POSerialization.InvalidDataContractException was unhandled
 

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  1. POSerialization.InvalidDataContractException was unhandled
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    <pre><code>public class SerializablionHelper { public SerializablionHelper() { this.Entities = new Collection&lt;Base&gt;(); } public ICollection&lt;Base&gt; Entities { get; set; } } // [DataContract] // [KnownType(typeof(A))] // [KnownType(typeof(B))] public abstract class Base { } [DataContract] public class A : Base { public int IntTest { get; set; } [DataMember] public string StringTest { get; set; } } [DataContract] public class B : Base { [DataMember] public int IntTest { get; set; } [DataMember] public string StringTest { get; set; } } public static void Main(string[] args) { var objectA = new A { IntTest = 5, StringTest = "TestA" }; var objectB = new B { IntTest = 25, StringTest = "TestB" }; var serList = new SerializablionHelper(); serList.Entities.Add(objectA); serList.Entities.Add(objectB); var dcSerializer = new DataContractSerializer(typeof(SerializablionHelper)); var xmlWriterSetting = new XmlWriterSettings() { Indent = true }; using (var xmlWriter = XmlWriter.Create("C:\\test.xml", xmlWriterSetting)) { dcSerializer.WriteObject(xmlWriter, serList); } } </code></pre> <p>When I run this code I get this exception.</p> <p>Type 'XMLSerializer.Program+A' cannot inherit from a type that is not marked with DataContractAttribute or SerializableAttribute. Consider marking the base type 'XMLSerializer.Program+Base' with DataContractAttribute or SerializableAttribute, or removing them from the derived type.</p> <p>When I recommitted this code:</p> <pre><code>// [DataContract] // [KnownType(typeof(A))] // [KnownType(typeof(B))] </code></pre> <p>The code will working.</p> <p>The problem I cannot make the base class as DataContract. Is there is any way to make this code working without Adding the DataContract to the base class or I have to take another serialization strategy?</p>
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    1. This table or related slice is empty.
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    1. This table or related slice is empty.
    1. This table or related slice is empty.
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    1. This table or related slice is empty.
    1. This table or related slice is empty.
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      1. POSerialization.InvalidDataContractException was unhandled
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      1. POSerialization.InvalidDataContractException was unhandled
      1. USBassam Alugili
      1. VTFavorite
    1. COTry to put the DataContract on SerializablionHelper will this help?
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      1. POSerialization.InvalidDataContractException was unhandled
      1. USBassam Alugili
    2. CONo same exception with other error message.
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      1. POSerialization.InvalidDataContractException was unhandled
      1. This table or related slice is empty.
 

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