How to convert DateTime from JSON to C#? [duplicate]

Question

Possible Duplicate:
How to convert UNIX timestamp to DateTime and vice versa?

I've got the following class:

[DataContractAttribute]
public class TestClass
{
  [DataMemberAttribute]
  public DateTime MyDateTime { get; set; }
}

Here's the JSON:

{ "MyDateTime":"1221818565" }

The JSON is being returned from a PHP webservice.

What I need to do, is convert that epoch string into a valid C# DateTime. What's the best way of doing this?

I can do this:

[IgnoreDataMemberAttribute]
public DateTime MyDateTime { get; set; }

[DataMemberAttribute(Name = "MyDateTime")]
public Int32 MyDateTimeTicks
{
  get { return this.MyDateTime.Convert(...); }
  set { this.Created = new DateTime(...); }
}

But the trouble with this is, the MyDateTimeTicks is public (changing it to private causes an exception in the serialization process)

Answer 1

Finishing what you posted, AND making it private seemed to work fine for me.

[DataContract]
public class TestClass
{

    private static readonly DateTime unixEpoch = new DateTime(1970, 1, 1, 0, 0, 0, 0, DateTimeKind.Utc);

    [IgnoreDataMember]
    public DateTime MyDateTime { get; set; }

    [DataMember(Name = "MyDateTime")]
    private int MyDateTimeTicks
    {
        get { return (int)(this.MyDateTime - unixEpoch).TotalSeconds; }
        set { this.MyDateTime = unixEpoch.AddSeconds(Convert.ToInt32(value)); }
    }

}