# CollectionExtensionMethods.ToInstanceIdSet examples

Examples for [ToInstanceIdSet](https://developer.rhino3d.com/api/gh2/type/grasshopper2.extensions.collectionextensionmethods/toinstanceidset.md) in Grasshopper2.Extensions.CollectionExtensionMethods.

## C#

```cs
using Grasshopper2.Extensions;

// As an extension method
HashSet<Guid> result = objects.ToInstanceIdSet();

// As a static method
result = CollectionExtensionMethods.ToInstanceIdSet(objects);
```

## Python

```python
import clr
clr.AddReference('Grasshopper2')
import Grasshopper2.Extensions
clr.ImportExtensions(Grasshopper2.Extensions)

# As an extension method
result = objects.ToInstanceIdSet()

# As a static method
result = Grasshopper2.Extensions.CollectionExtensionMethods.ToInstanceIdSet(objects)
```