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 # Class OperationAPI

 Last update: 16.07.2025 

Namespace: [VM.API.Pre](VM.API.Pre.md)  
Assembly: VM.API.Pre.dll

This class implements APIs for operation class.

```csharp
public static class OperationAPI

```

#### Inheritance

[object](https://learn.microsoft.com/dotnet/api/system.object) ← [OperationAPI](VM.API.Pre.OperationAPI.md)

#### 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<T>(object, LinkPropertyType)](VM.Models.Pre.Cache.LinkPropertyItemCache.md#VM_Models_Pre_Cache_LinkPropertyItemCache_GetLinkedObjects__1_System_Object_VM_Models_Pre_LinkPropertyType_)

## Methods

### ChangeEnableState(Obj, bool)

```csharp
[NotNullObj(new string[] { "enableObj" })]
public static void ChangeEnableState(this Obj enableObj, bool isEnable = true)

```

#### Parameters

`enableObj` [Obj](VM.API.Pre.Obj.md)

`isEnable` [bool](https://learn.microsoft.com/dotnet/api/system.boolean)

### ChangeEnableState(IEnumerable<Obj>, bool)

```csharp
[NotNull(new string[] { "enableObjs" })]
public static void ChangeEnableState(this IEnumerable<Obj> enableObjs, bool isEnable = true)

```

#### Parameters

`enableObjs` [IEnumerable](https://learn.microsoft.com/dotnet/api/system.collections.generic.ienumerable-1)&lt;[Obj](VM.API.Pre.Obj.md)&gt;

`isEnable` [bool](https://learn.microsoft.com/dotnet/api/system.boolean)

### ChangeInterface(Obj, bool)

```csharp
[NotNullObj(new string[] { "interfaceObj" })]
public static void ChangeInterface(this Obj interfaceObj, bool isInterface = false)

```

#### Parameters

`interfaceObj` [Obj](VM.API.Pre.Obj.md)

`isInterface` [bool](https://learn.microsoft.com/dotnet/api/system.boolean)

### ChangeVisibleState(Obj, bool)

```csharp
[NotNullObj(new string[] { "visibleObj" })]
public static void ChangeVisibleState(this Obj visibleObj, bool isVisible = true)

```

#### Parameters

`visibleObj` [Obj](VM.API.Pre.Obj.md)

`isVisible` [bool](https://learn.microsoft.com/dotnet/api/system.boolean)

### ChangeVisibleState(IEnumerable&lt;Obj&gt;, bool)

```csharp
[NotNull(new string[] { "visibleObjs" })]
public static void ChangeVisibleState(this IEnumerable<Obj> visibleObjs, bool isVisible = true)

```

#### Parameters

`visibleObjs` [IEnumerable](https://learn.microsoft.com/dotnet/api/system.collections.generic.ienumerable-1)&lt;[Obj](VM.API.Pre.Obj.md)&gt;

`isVisible` [bool](https://learn.microsoft.com/dotnet/api/system.boolean)

### Delete(Obj)

Delete the entity.

```csharp
[NotNullObj(new string[] { "entity" })]
public static void Delete(this Obj entity)

```

#### Parameters

`entity` [Obj](VM.API.Pre.Obj.md)

The entity to be deleted.

#### Exceptions

[ArgumentNullException](https://learn.microsoft.com/dotnet/api/system.argumentnullexception)

Will be thrown if 'entity' arguments are empty.

[ArgumentNullException](https://learn.microsoft.com/dotnet/api/system.argumentnullexception)

Will be thrown if document of 'entity' arguments are empty.

### Duplicate(Obj)

```csharp
[NotNullObj(new string[] { "entity" })]
public static void Duplicate(this Obj entity)

```

#### Parameters

`entity` [Obj](VM.API.Pre.Obj.md)

### Duplicate(IEnumerable&lt;Obj&gt;)

```csharp
[NotNull(new string[] { "entities" })]
public static void Duplicate(this IEnumerable<Obj> entities)

```

#### Parameters

`entities` [IEnumerable](https://learn.microsoft.com/dotnet/api/system.collections.generic.ienumerable-1)&lt;[Obj](VM.API.Pre.Obj.md)&gt;

### Flip(Obj)

```csharp
[NotNullObj(new string[] { "entity" })]
public static void Flip(this Obj entity)

```

#### Parameters

`entity` [Obj](VM.API.Pre.Obj.md)

### Flip(IEnumerable&lt;Obj&gt;)

```csharp
[NotNull(new string[] { "entities" })]
public static void Flip(this IEnumerable<Obj> entities)

```

#### Parameters

`entities` [IEnumerable](https://learn.microsoft.com/dotnet/api/system.collections.generic.ienumerable-1)&lt;[Obj](VM.API.Pre.Obj.md)&gt;

### SetTransparency(Obj, ExpressionValueVariable)

```csharp
[NotNullObj(new string[] { "body" })]
public static void SetTransparency(this Obj body, ExpressionValueVariable transparency)

```

#### Parameters

`body` [Obj](VM.API.Pre.Obj.md)

`transparency` ExpressionValueVariable

### UpdateCADName(Obj, string)

```csharp
[NotNull(new string[] { "cadBody" })]
[NotNullOrEmpty(new string[] { "strName" })]
public static void UpdateCADName(this Obj cadBody, string strName)

```

#### Parameters

`cadBody` [Obj](VM.API.Pre.Obj.md)

`strName` [string](https://learn.microsoft.com/dotnet/api/system.string)

### UpdateName(Obj, string)

```csharp
[NotNull(new string[] { "nameObj" })]
[NotNullOrEmpty(new string[] { "strName" })]
public static void UpdateName(this Obj nameObj, string strName)

```

#### Parameters

`nameObj` [Obj](VM.API.Pre.Obj.md)

`strName` [string](https://learn.microsoft.com/dotnet/api/system.string)

### UpdateSymmetric(Obj, bool)

```csharp
[NotNullObj(new string[] { "symMgr" })]
public static void UpdateSymmetric(this Obj symMgr, bool symmetric = true)

```

#### Parameters

`symMgr` [Obj](VM.API.Pre.Obj.md)

`symmetric` [bool](https://learn.microsoft.com/dotnet/api/system.boolean)