## On this page

  

 

 # Class DocumentCategoryAddRemoveEventBase

 Last update: 09.03.2026 

<a id="VM_Managed_History_DocumentCategoryAddRemoveEventBase"></a>

Namespace: [VM.Managed.History](VM.Managed.History.md)  
Assembly: VMAppCore.dll

```csharp
public abstract class DocumentCategoryAddRemoveEventBase : HistoryEvent

```

#### Inheritance

object ← [HistoryEvent](https://github.com/AnsysVirtualMotion/DAFUL/blob/9110677a5f6a53d7604f8dfd35b4c5fceb59e8e0/DAFUL/ClassicPre/Data/VMHist/HistoryEvent.cs) ← [DocumentCategoryAddRemoveEventBase](VM.Managed.History.DocumentCategoryAddRemoveEventBase.md)

#### Derived

[DocumentCategoryAddEvent](VM.Managed.History.DocumentCategoryAddEvent.md), [DocumentCategoryRemoveEvent](VM.Managed.History.DocumentCategoryRemoveEvent.md)

#### Inherited Members

[HistoryEvent.ClearEvent(bool)](https://github.com/AnsysVirtualMotion/DAFUL/blob/9110677a5f6a53d7604f8dfd35b4c5fceb59e8e0/DAFUL/ClassicPre/Data/VMHist/HistoryEvent.cs), [HistoryEvent.Undo(HistoryEventArgs)](https://github.com/AnsysVirtualMotion/DAFUL/blob/9110677a5f6a53d7604f8dfd35b4c5fceb59e8e0/DAFUL/ClassicPre/Data/VMHist/HistoryEvent.cs), [HistoryEvent.Redo(HistoryEventArgs)](https://github.com/AnsysVirtualMotion/DAFUL/blob/9110677a5f6a53d7604f8dfd35b4c5fceb59e8e0/DAFUL/ClassicPre/Data/VMHist/HistoryEvent.cs), [HistoryEvent.Clear(bool)](https://github.com/AnsysVirtualMotion/DAFUL/blob/9110677a5f6a53d7604f8dfd35b4c5fceb59e8e0/DAFUL/ClassicPre/Data/VMHist/HistoryEvent.cs), [HistoryEvent.BeforeUndo(HistoryEventArgs)](https://github.com/AnsysVirtualMotion/DAFUL/blob/9110677a5f6a53d7604f8dfd35b4c5fceb59e8e0/DAFUL/ClassicPre/Data/VMHist/HistoryEvent.cs), [HistoryEvent.AfterUndo(HistoryEventArgs)](https://github.com/AnsysVirtualMotion/DAFUL/blob/9110677a5f6a53d7604f8dfd35b4c5fceb59e8e0/DAFUL/ClassicPre/Data/VMHist/HistoryEvent.cs), [HistoryEvent.BeforeRedo(HistoryEventArgs)](https://github.com/AnsysVirtualMotion/DAFUL/blob/9110677a5f6a53d7604f8dfd35b4c5fceb59e8e0/DAFUL/ClassicPre/Data/VMHist/HistoryEvent.cs), [HistoryEvent.AfterRedo(HistoryEventArgs)](https://github.com/AnsysVirtualMotion/DAFUL/blob/9110677a5f6a53d7604f8dfd35b4c5fceb59e8e0/DAFUL/ClassicPre/Data/VMHist/HistoryEvent.cs), [HistoryEvent.BeforeAdded(AddToHistoryManagerEventArgs)](https://github.com/AnsysVirtualMotion/DAFUL/blob/9110677a5f6a53d7604f8dfd35b4c5fceb59e8e0/DAFUL/ClassicPre/Data/VMHist/HistoryEvent.cs), [HistoryEvent.AfterAdded(HistoryEventArgs)](https://github.com/AnsysVirtualMotion/DAFUL/blob/9110677a5f6a53d7604f8dfd35b4c5fceb59e8e0/DAFUL/ClassicPre/Data/VMHist/HistoryEvent.cs), [HistoryEvent.IsValid](https://github.com/AnsysVirtualMotion/DAFUL/blob/9110677a5f6a53d7604f8dfd35b4c5fceb59e8e0/DAFUL/ClassicPre/Data/VMHist/HistoryEvent.cs)

#### Extension Methods

[LinkPropertyItemCache.GetLinkProperties(object, LinkPropertyType)](VM.Models.Pre.Cache.LinkPropertyItemCache.md#VM_Models_Pre_Cache_LinkPropertyItemCache_GetLinkProperties_System_Object_VM_Models_Pre_LinkPropertyType_), [LinkPropertyItemCache.GetLinkPropertiesAndValues(object, LinkPropertyType)](VM.Models.Pre.Cache.LinkPropertyItemCache.md#VM_Models_Pre_Cache_LinkPropertyItemCache_GetLinkPropertiesAndValues_System_Object_VM_Models_Pre_LinkPropertyType_), [LinkPropertyItemCache.GetLinkedObjects&lt;T&gt;(object, LinkPropertyType)](VM.Models.Pre.Cache.LinkPropertyItemCache.md#VM_Models_Pre_Cache_LinkPropertyItemCache_GetLinkedObjects__1_System_Object_VM_Models_Pre_LinkPropertyType_)

## Constructors

### <a id="VM_Managed_History_DocumentCategoryAddRemoveEventBase__ctor_VM_Managed_Document_VM_Managed_ObjectBase_VM_Managed_ObjectBase_VM_Managed_Collections_LinkLinkedList_VM_Managed_ObjectBase_VM_Managed_Child_VM_Managed_ObjectBase_VM_Managed_LinkContainer_Update___"></a> DocumentCategoryAddRemoveEventBase(Document, ObjectBase, ObjectBase, LinkLinkedList&lt;ObjectBase, Child&lt;ObjectBase, Update&gt;&gt;)

```csharp
protected DocumentCategoryAddRemoveEventBase(Document document, ObjectBase obj, ObjectBase objAfter, LinkLinkedList<ObjectBase, Child<ObjectBase, LinkContainer.Update>> category)

```

#### Parameters

`document` [Document](VM.Managed.Document.md)

`obj` [ObjectBase](VM.Managed.ObjectBase.md)

`objAfter` [ObjectBase](VM.Managed.ObjectBase.md)

`category` [LinkLinkedList](VM.Managed.Collections.LinkLinkedList-2.md)&lt;[ObjectBase](VM.Managed.ObjectBase.md), [Child](VM.Managed.Child-2.md)&lt;[ObjectBase](VM.Managed.ObjectBase.md), [LinkContainer](VM.Managed.LinkContainer.md).[Update](VM.Managed.LinkContainer.Update.md)&gt;&gt;

## Fields

### <a id="VM_Managed_History_DocumentCategoryAddRemoveEventBase_m_category"></a> m\_category

```csharp
protected LinkLinkedList<ObjectBase, Child<ObjectBase, LinkContainer.Update>> m_category

```

#### Field Value

[LinkLinkedList](VM.Managed.Collections.LinkLinkedList-2.md)&lt;[ObjectBase](VM.Managed.ObjectBase.md), [Child](VM.Managed.Child-2.md)&lt;[ObjectBase](VM.Managed.ObjectBase.md), [LinkContainer](VM.Managed.LinkContainer.md).[Update](VM.Managed.LinkContainer.Update.md)&gt;&gt;

### <a id="VM_Managed_History_DocumentCategoryAddRemoveEventBase_m_doc"></a> m\_doc

```csharp
protected Document3D m_doc

```

#### Field Value

[Document3D](VM.Managed.Document3D.md)

### <a id="VM_Managed_History_DocumentCategoryAddRemoveEventBase_m_objAfterKey"></a> m\_objAfterKey

```csharp
protected UIntPtr m_objAfterKey

```

#### Field Value

UIntPtr

### <a id="VM_Managed_History_DocumentCategoryAddRemoveEventBase_m_objKey"></a> m\_objKey

```csharp
protected UIntPtr m_objKey

```

#### Field Value

UIntPtr

## Methods

### <a id="VM_Managed_History_DocumentCategoryAddRemoveEventBase_AddEventCore_VM_Models_Pre_IDocument_VM_Managed_History_HistoryEvent_"></a> AddEventCore(IDocument, HistoryEvent)

```csharp
public static void AddEventCore(IDocument doc, HistoryEvent eventHist)

```

#### Parameters

`doc` IDocument

`eventHist` [HistoryEvent](https://github.com/AnsysVirtualMotion/DAFUL/blob/9110677a5f6a53d7604f8dfd35b4c5fceb59e8e0/DAFUL/ClassicPre/Data/VMHist/HistoryEvent.cs)

### <a id="VM_Managed_History_DocumentCategoryAddRemoveEventBase_Clear_System_Boolean_"></a> Clear(bool)

```csharp
protected override void Clear(bool bReserveReferenceCount)

```

#### Parameters

`bReserveReferenceCount` bool

### <a id="VM_Managed_History_DocumentCategoryAddRemoveEventBase_GetObjectFromKey_System_UIntPtr_"></a> GetObjectFromKey(UIntPtr)

```csharp
protected ObjectBase GetObjectFromKey(UIntPtr key)

```

#### Parameters

`key` UIntPtr

#### Returns

[ObjectBase](VM.Managed.ObjectBase.md)

### <a id="VM_Managed_History_DocumentCategoryAddRemoveEventBase_IsAvailableEvent_VM_Models_Pre_IDocument_"></a> IsAvailableEvent(IDocument)

```csharp
public static bool IsAvailableEvent(IDocument doc)

```

#### Parameters

`doc` IDocument

#### Returns

bool