> For the complete documentation index, see [llms.txt](https://docs.soraco.co/docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.soraco.co/docs/api-reference/.net-api/qlmlicense/client-side-methods/verifyactivatedlicensefile.md).

# VerifyActivatedLicenseFile

### Description

Parses the license file generated by the License Server, validates its signature and populates the ILicenseInfo object.

```csharp
ILicenseInfo VerifyActivatedLicenseFile(string activationKey, string computerKey, string computerID, 
                                               out string errorMessage)
```

### Arguments

| Name          | Data Type | Description                                              |
| ------------- | :-------: | -------------------------------------------------------- |
| activationKey |   string  | the activation key                                       |
| computerKey   |   string  | the computer key                                         |
| computerID    |   string  | ID of the computer where the license is being validated. |
| errorMessage  |   string  | error message if the operation failed.                   |

### Return

| Data Type | Description                               |
| :-------: | ----------------------------------------- |
|   string  | the content of the activated license file |

### Remarks

If the license file is not found or is not valid, this function will try to download a new license file from the server.

This function is intended to be used in conjunction with license keys. In addition to validating the license file, it validates that the provided activation key and computer key match the keys in the license file.