# SendWebRequest()

> Begin communicating with the remote server.

## Definition

* **Type:** Method
* **Namespace:** [UnityEngine.Networking](/engine/7000.0/script-reference/unityengine/networking.md)
* **Assembly:** UnityEngine.UnityWebRequestModule

```csharp
public UnityWebRequestAsyncOperation SendWebRequest()
```

### Returns

| Type                                                                                                                     | Description                                                                                                                                                                                                                                                              |
| ------------------------------------------------------------------------------------------------------------------------ | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |
| [UnityWebRequestAsyncOperation](/engine/7000.0/script-reference/unityengine/networking/unitywebrequestasyncoperation.md) | An [UnityWebRequestAsyncOperation](/engine/7000.0/script-reference/unityengine/networking/unitywebrequestasyncoperation.md) object that tracks the progress of the request. Yield it inside a coroutine to wait until the request finishes or encounters a system error. |

### Remarks

After calling this method, the [UnityWebRequest](/engine/7000.0/script-reference/unityengine/networking/unitywebrequest.md) will perform DNS resolution (if necessary), transmit an HTTP request to the remote server at the target URL and process the server’s response.

This method can only be called once on any given [UnityWebRequest](/engine/7000.0/script-reference/unityengine/networking/unitywebrequest.md) object.

Once this method is called, you cannot change any of the UnityWebRequest’s properties. You cannot change [UnityWebRequest](/engine/7000.0/script-reference/unityengine/networking/unitywebrequest.md) properties after [UnityWebRequest.SendWebRequest](/engine/7000.0/script-reference/unityengine/networking/unitywebrequest/sendwebrequest.md) is called.