# MimeTypeHelper

`MimeTypeHelper` class provides methods for getting a file extension (starts with dot, e.g. ".pdf") by a MIME type and vice versa.

## GetMimeType()

Returns MIME type by file extension.

```csharp
string extension = ".pdf";
string mimeType = MimeTypeHelper.GetMimeType(extension); // Returns "application/pdf".
```

All parameters:

| Param name | Param type | Description         |
| ---------- | ---------- | ------------------- |
| extension  | `string`   | The file extension. |

## GetExtension()

Returns file extension by MIME type.

```csharp
string mimeType = "application/pdf";
string extension = MimeTypeHelper.GetExtension(mimeType); // Returns ".pdf".
```

All parameters:

| Param name      | Param type | Description                                                                                          |
| --------------- | ---------- | ---------------------------------------------------------------------------------------------------- |
| mimeType        | `string`   | The MIME type.                                                                                       |
| throwIfNotFound | `bool`     | The flag indicates the need for an exception if the MIME type is not found. Default value is `true`. |

## GetExtensions()

Returns file extensions by MIME type. Some MIME types has any various of extensions. For example:

```csharp
string mimeType = "image/jpeg";
IEnumerable<string> extensions = MimeTypeHelper.GetExtensions(mimeType); // Returns (".jpe", ".jpg", ".jpeg")
```

All parameters:

| Param name      | Param type | Description                                                                                          |
| --------------- | ---------- | ---------------------------------------------------------------------------------------------------- |
| mimeType        | `string`   | The MIME type.                                                                                       |
| throwIfNotFound | `bool`     | The flag indicates the need for an exception if the MIME type is not found. Default value is `true`. |