# unsupportedIdentifier

> Value returned by SystemInfo string properties which are not supported on the current platform.

## Definition

* **Type:** Field
* **Namespace:** [UnityEngine](/engine/6000.5/script-reference/unityengine.md)
* **Assembly:** UnityEngine.CoreModule

```csharp
public const string unsupportedIdentifier = "n/a"
```

### Examples

```csharp
using UnityEngine;
using System.Collections;

public class NewBehaviourScript : MonoBehaviour
{
    void Start()
    {
        if (SystemInfo.unsupportedIdentifier != SystemInfo.deviceUniqueIdentifier)
        {
            // use SystemInfo.deviceUniqueIdentifier
        }
    }
}
```