# ProjectGuid()

> Returns the GUID of the project.

## Definition

* **Type:** Method
* **Namespace:** [UnityEditor.iOS.Xcode](/engine/6000.7/script-reference/unityeditor/ios/xcode.md)
* **Assembly:** UnityEditor.iOS.Extensions.Xcode

```csharp
public string ProjectGuid()
```

### Returns

| Type                                                           | Description              |
| -------------------------------------------------------------- | ------------------------ |
| [string](https://learn.microsoft.com/dotnet/api/system.string) | The GUID of the project. |

### Remarks

The project GUID identifies a project-wide native target which is used to set project-wide properties. This GUID can be passed to any functions that accepts target GUIDs as parameters.

### Examples

```csharp
using UnityEngine;
using UnityEditor;
using System.IO;
using UnityEditor.Callbacks;
using UnityEditor.iOS.Xcode;

public class Sample_ProjectGuid  
{
    [PostProcessBuild]
    public static void OnPostprocessBuild(BuildTarget buildTarget, string pathToBuiltProject)
    {

        // Stop processing if build target is not iOS
        if (buildTarget != BuildTarget.iOS)
            return;

        // Initialize PBXProject
        string projectPath = PBXProject.GetPBXProjectPath(pathToBuiltProject);
        PBXProject pbxProject = new PBXProject();
        pbxProject.ReadFromFile(projectPath);

        // Get the project GUID
        string projectGuid = pbxProject.ProjectGuid();

        // Log the project GUID for debugging
        Debug.Log("Project GUID: " + projectGuid);

        // Use the GUID to make project-wide changes such as adding properties
        pbxProject.AddBuildProperty(projectGuid, "exampleProperty", "exampleValue");

        // Apply changes to the pbxproj file if there were any
        pbxProject.WriteToFile(projectPath);
    }
}
```