---
title: NSManagedObjectContext.WillSaveMessage
framework: coredata
role: symbol
role_heading: Structure
path: coredata/nsmanagedobjectcontext/willsavemessage
---

# NSManagedObjectContext.WillSaveMessage

Posted before a main queue context saves.

## Declaration

```swift
struct WillSaveMessage
```

## Overview

Overview Only use this message type for contexts with NSMainQueueConcurrencyType.

## Topics

### Instance Properties

- [context](coredata/nsmanagedobjectcontext/willsavemessage/context.md)

## Relationships

### Conforms To

- [NotificationCenter.MainActorMessage](foundation/notificationcenter/mainactormessage.md)
- [SendableMetatype](swift/sendablemetatype.md)