# EntityChangeSet > An atomic package of changes to entity and component data. ## Definition * **Type:** Struct * **Namespace:** [Unity.Entities](/engine/7000.0/script-reference/unity/entities.md) * **Assembly:** UnityEngine.EntitiesModule * **Implements:** [IDisposable](https://learn.microsoft.com/dotnet/api/system.idisposable) ```csharp public readonly struct EntityChangeSet : IDisposable ``` ## Fields | Value | Description | | ------------------------------------------------------------------------------------------------------------------------------ | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | [AddArchetypes](/engine/7000.0/script-reference/unity/entities/entitychangeset/addarchetypes.md) | A set of all archetype created in this change-set. | | [AddComponents](/engine/7000.0/script-reference/unity/entities/entitychangeset/addcomponents.md) | A set of all component additions in this change-set. | | [BlobAssetData](/engine/7000.0/script-reference/unity/entities/entitychangeset/blobassetdata.md) | The payload for all blob assets in this change set. | | [BlobAssetReferenceChanges](/engine/7000.0/script-reference/unity/entities/entitychangeset/blobassetreferencechanges.md) | A packed set of all blob asset references to patch. | | [ComponentData](/engine/7000.0/script-reference/unity/entities/entitychangeset/componentdata.md) | Data payload for all component changes specified in [EntityChangeSet.SetComponents](/engine/7000.0/script-reference/unity/entities/entitychangeset/setcomponents.md) | | [CreatedBlobAssets](/engine/7000.0/script-reference/unity/entities/entitychangeset/createdblobassets.md) | A set of all blob asset creations in this change set. | | [CreatedEntityCount](/engine/7000.0/script-reference/unity/entities/entitychangeset/createdentitycount.md) | Number of entities from the start of [EntityChangeSet.Entities](/engine/7000.0/script-reference/unity/entities/entitychangeset/entities.md) that should be considered as created. | | [DestroyedBlobAssets](/engine/7000.0/script-reference/unity/entities/entitychangeset/destroyedblobassets.md) | A set of all blob assets destroyed in this change set. Identified by the content hash. | | [DestroyedEntityCount](/engine/7000.0/script-reference/unity/entities/entitychangeset/destroyedentitycount.md) | Number of entities from the end of [EntityChangeSet.Entities](/engine/7000.0/script-reference/unity/entities/entitychangeset/entities.md) that should be considered as destroyed. | | [Entities](/engine/7000.0/script-reference/unity/entities/entitychangeset/entities.md) | A packed array of all entities in this change-set. | | [EntityReferenceChanges](/engine/7000.0/script-reference/unity/entities/entitychangeset/entityreferencechanges.md) | A packed set of all entity references to patch. | | [LinkedEntityGroupAdditions](/engine/7000.0/script-reference/unity/entities/entitychangeset/linkedentitygroupadditions.md) | A set of all linked entity group additions. | | [LinkedEntityGroupRemovals](/engine/7000.0/script-reference/unity/entities/entitychangeset/linkedentitygroupremovals.md) | A set of all linked entity group removals. | | [NameChangedCount](/engine/7000.0/script-reference/unity/entities/entitychangeset/namechangedcount.md) | Number of entities of which names changed in [EntityChangeSet.NameChangedEntityGuids](/engine/7000.0/script-reference/unity/entities/entitychangeset/namechangedentityguids.md) in this change-set, not including created and destroyed entities. | | [NameChangedEntityGuids](/engine/7000.0/script-reference/unity/entities/entitychangeset/namechangedentityguids.md) | Entities of which names changed in this change-set, not including created and destroyed entities. | | [Names](/engine/7000.0/script-reference/unity/entities/entitychangeset/names.md) | Changed names including created and destroyed entities in this change-set. | | [RemoveComponents](/engine/7000.0/script-reference/unity/entities/entitychangeset/removecomponents.md) | A set of all component removals in this change-set. | | [SetComponents](/engine/7000.0/script-reference/unity/entities/entitychangeset/setcomponents.md) | A set of all component data modifications in this change-set. | | [SetSharedComponents](/engine/7000.0/script-reference/unity/entities/entitychangeset/setsharedcomponents.md) | A set of all shared component data changes. | | [TypeHashes](/engine/7000.0/script-reference/unity/entities/entitychangeset/typehashes.md) | A packed array of all types in this change-set. | | [UnmanagedSharedComponentData](/engine/7000.0/script-reference/unity/entities/entitychangeset/unmanagedsharedcomponentdata.md) | All unmanaged shared data are stored here | ## Constructors | Constructor | Description | | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ----------------------------------------------------------------------------------------------------------------------- | | [EntityChangeSet(System.Int32,System.Int32,System.Int32,Unity.Collections.NativeArray\{Unity.Entities.EntityGuid},Unity.Collections.NativeArray\{Unity.Entities.ComponentTypeHash},Unity.Collections.NativeArray\{Unity.Collections.FixedString64Bytes},Unity.Collections.NativeArray\{Unity.Entities.EntityGuid},Unity.Collections.NativeArray\{Unity.Entities.PackedComponent},Unity.Collections.NativeArray\{Unity.Entities.FilteredArchetype},Unity.Collections.NativeArray\{Unity.Entities.PackedComponent},Unity.Collections.NativeArray\{Unity.Entities.PackedComponentDataChange},Unity.Collections.NativeArray\{System.Byte},Unity.Collections.NativeArray\{Unity.Entities.EntityReferenceChange},Unity.Collections.NativeArray\{Unity.Entities.BlobAssetReferenceChange},Unity.Entities.PackedSharedComponentDataChange\[\],Unity.Collections.LowLevel.Unsafe.UnsafeAppendBuffer,Unity.Collections.NativeArray\{Unity.Entities.LinkedEntityGroupChange},Unity.Collections.NativeArray\{Unity.Entities.LinkedEntityGroupChange},Unity.Collections.NativeArray\{Unity.Entities.BlobAssetChange},Unity.Collections.NativeArray\{System.UInt64},Unity.Collections.NativeArray\{System.Byte})](/engine/7000.0/script-reference/unity/entities/entitychangeset/ctor.md) | Initializes a new instance of the [EntityChangeSet](/engine/7000.0/script-reference/unity/entities/entitychangeset.md). | ## Properties | Property | Description | | ------------------------------------------------------------------------------------------ | ------------------------------------------------ | | [HasChanges](/engine/7000.0/script-reference/unity/entities/entitychangeset/haschanges.md) | Returns true if this object contains any change. | | [IsCreated](/engine/7000.0/script-reference/unity/entities/entitychangeset/iscreated.md) | Returns true if this object is allocated. | ## Methods | Method | Description | | ------------------------------------------------------------------------------------ | ------------------------------------------ | | [Dispose](/engine/7000.0/script-reference/unity/entities/entitychangeset/dispose.md) | Disposes the memory used by the change set |