# TryGetSingletonBuffer<T>(out DynamicBuffer<T>, bool)

> Gets the value of a singleton buffer component, and returns whether or not a singleton buffer component of the specified type exists in the World. Note that if querying a singleton buffer component from a system-associated entity, the query must include either EntityQueryOptions.IncludeSystems or the SystemInstance component.

## Definition

* **Type:** Method
* **Namespace:** [Unity.Entities](/engine/7000.0/script-reference/unity/entities.md)
* **Assembly:** UnityEngine.EntitiesModule

## TryGetSingletonBuffer\<T>(DynamicBuffer\<T>, bool)

```csharp
public bool TryGetSingletonBuffer<T>(out DynamicBuffer<T> value, bool isReadOnly = false) where T : unmanaged, IBufferElementData
```

### Parameters

**** (\[DynamicBuffer\<T>]\(/engine/7000.0/script-reference/unity/entities/dynamicbuffer1)): The buffer. if an [Entity](/engine/7000.0/script-reference/unity/entities/entity.md) with the specified type does not exist in the [World](/engine/7000.0/script-reference/unity/entities/world.md), this is assigned a default value**** (\[bool]\(https\://learn.microsoft.com/dotnet/api/system.boolean)): Whether the buffer data is read-only or not. Set to false by default.

### Returns

| Type                                                          | Description                                                                                                                                                                                                        |
| ------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |
| [bool](https://learn.microsoft.com/dotnet/api/system.boolean) | True, if exactly one [Entity](/engine/7000.0/script-reference/unity/entities/entity.md) matches the [EntityQuery](/engine/7000.0/script-reference/unity/entities/entityquery.md) with the provided component type. |