# MarkAsUsed

> Bumps the timestamp of a cached file to be the current time.

## Definition

* **Type:** Method
* **Namespace:** [UnityEngine](/engine/6000.7/script-reference/unityengine.md)
* **Assembly:** UnityEngine.CoreModule

## MarkAsUsed(string, int)

Bumps the timestamp of a cached file to be the current time.

> **Warning:**
>
> **Deprecated.** Please use MarkAsUsed with Hash128 instead.

```csharp
public static bool MarkAsUsed(string url, int version)
```

### Parameters

**** (\[string]\(https\://learn.microsoft.com/dotnet/api/system.string)): The filename of the AssetBundle. Domain and path information are stripped from this string automatically.**** (\[int]\(https\://learn.microsoft.com/dotnet/api/system.int32)): The version number of the AssetBundle to mark as recently used.

### Returns

| Type                                                          | Description                                                                  |
| ------------------------------------------------------------- | ---------------------------------------------------------------------------- |
| [bool](https://learn.microsoft.com/dotnet/api/system.boolean) | True if the specified AssetBundle version is in the cache. Otherwise, false. |

### Remarks

This allows you to keep files in the cache even if you are not explicitly loading them. Returns true if the url is cached.

## MarkAsUsed(string, Hash128)

Bumps the timestamp of a cached file to be the current time.

```csharp
public static bool MarkAsUsed(string url, Hash128 hash)
```

### Parameters

**** (\[string]\(https\://learn.microsoft.com/dotnet/api/system.string)): The filename of the AssetBundle. Domain and path information are stripped from this string automatically.**** (Hash128): The version hash of the AssetBundle to mark as recently used.

### Returns

| Type                                                          | Description                                                                  |
| ------------------------------------------------------------- | ---------------------------------------------------------------------------- |
| [bool](https://learn.microsoft.com/dotnet/api/system.boolean) | True if the specified AssetBundle version is in the cache. Otherwise, false. |

### Remarks

This allows you to keep files in the cache even if you are not explicitly loading them.

## MarkAsUsed(CachedAssetBundle)

Bumps the timestamp of a cached file to be the current time.

```csharp
public static bool MarkAsUsed(CachedAssetBundle cachedBundle)
```

### Parameters

**** (\[CachedAssetBundle]\(/engine/6000.7/script-reference/unityengine/cachedassetbundle)): A [CachedAssetBundle](/engine/6000.7/script-reference/unityengine/cachedassetbundle.md) struct that pairs the AssetBundle name with the version hash to mark as recently used.

### Returns

| Type                                                          | Description                                                                  |
| ------------------------------------------------------------- | ---------------------------------------------------------------------------- |
| [bool](https://learn.microsoft.com/dotnet/api/system.boolean) | True if the specified AssetBundle version is in the cache. Otherwise, false. |

### Remarks

This allows you to keep files in the cache even if you are not explicitly loading them.