Give the classes:

```
public class Parent
{
    public int id {get; set;}
    public int name {get; set;}

    public virtual ICollection<Child> children {get; set;}
}

[Table("Child")]
public partial class Child
{
    [Key]
    public int id {get; set;}
    public string name { get; set; }

    [NotMapped]
    public string nickName { get; set; }
}

```

And the controller code:

```
List<Parent> parents = parentRepository.Get();
return Json(parents); 

```

It works on LOCALHOST, but it does not work on live server:

> 
> ERROR : **Json A circular reference was detected while serializing an object of type**
> 
> 
> 

I did a search and found the `[ScriptIgnore]` attribute, so I changed the model to

```
using System.Web.Script.Serialization;

public class Parent
{
    public int id {get; set;}
    public int name {get; set;}

    [ScriptIgnore]
    public virtual ICollection<Child> children {get; set;}
}

```

But the same error occur on live server (win2008).

How can I avoid that error and serialize the parent data successfully?