# AddMetadata(IMetadata)

> Adds a metadata item to the collection.

## Definition

* **Type:** Method
* **Namespace:** [Unity.Localization](/engine/6000.7/script-reference/unity/localization.md)
* **Assembly:** UnityEngine.LocalizationRuntimeModule

```csharp
public void AddMetadata(IMetadata metadata)
```

### Parameters

**** (\[IMetadata]\(/engine/6000.7/script-reference/unity/localization/imetadata)): The item to add.

### Remarks

A null item is ignored. Some metadata kinds are marked single-instance through [MetadataAttribute](/engine/6000.7/script-reference/unity/localization/metadataattribute.md). This method does not enforce that, so check with [MetadataCollection.Contains](/engine/6000.7/script-reference/unity/localization/metadatacollection/contains.md) first when only one item of a type is wanted.

Attach a comment to a collection.

### Examples

```csharp
using Unity.Localization;

namespace Unity.Localization.Samples
{
    public class MetadataCollectionAddMetadataExample
    {
        public void Run(MetadataCollection metadata)
        {
            metadata.AddMetadata(new Comment { CommentText = "Needs a plural form." });
        }
    }
}
```