# MimeTypes

Namespace: **Wisej.Core**

Assembly: **Wisej.Framework** (4.0.0.0)

Maps document extensions to content MIME types.

{% tabs %}
{% tab title="C#" %}

```csharp
public class MimeTypes
```

{% endtab %}

{% tab title="VB.NET" %}

```visual-basic
Public Class MimeTypes
```

{% endtab %}
{% endtabs %}

## Methods

### ![](/files/lIX317sDtMTZJBi9oSIx) GetMimeType(fileName)

Returns the MIME mapping for the specified file name.

| Parameter    | Type                                                          | Description                                            |
| ------------ | ------------------------------------------------------------- | ------------------------------------------------------ |
| **fileName** | [String](https://docs.microsoft.com/dotnet/api/system.string) | The file name that is used to determine the MIME type. |

**Returns:** [String](https://docs.microsoft.com/dotnet/api/system.string).

### ![](/files/lIX317sDtMTZJBi9oSIx) IsKnownType(extension)

Returns if the file extension corresponds to a known mime type.

| Parameter     | Type                                                          | Description                  |
| ------------- | ------------------------------------------------------------- | ---------------------------- |
| **extension** | [String](https://docs.microsoft.com/dotnet/api/system.string) | The file extension to check. |

**Returns:** [Boolean](https://docs.microsoft.com/dotnet/api/system.boolean).

### ![](/files/lIX317sDtMTZJBi9oSIx) SetMimeType(extension, mimeType)

Adds or changes the mime type for the specified file extension.

| Parameter     | Type                                                          | Description                                      |
| ------------- | ------------------------------------------------------------- | ------------------------------------------------ |
| **extension** | [String](https://docs.microsoft.com/dotnet/api/system.string) | The file extension to add to the mime type list. |
| **mimeType**  | [String](https://docs.microsoft.com/dotnet/api/system.string) | The mime type to add to the mime type list.      |


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.wisej.com/api/wisej.core/general/wisej.core.mimetypes.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.