> For the complete documentation index, see [llms.txt](https://docs.wisej.com/api/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.wisej.com/api/wisej.web/general/application/wisej.core.clientbrowser.md).
# ClientBrowser
Namespace: **Wisej.Core**
Assembly: **Wisej.Framework** (4.0.0.0)
Properties of the client browser currently interacting with the application.
{% tabs %}
{% tab title="C#" %}
```csharp
public class ClientBrowser : IUserData
```
{% endtab %}
{% tab title="VB.NET" %}
```visual-basic
Public Class ClientBrowser
Inherits IUserData
```
{% endtab %}
{% endtabs %}
## Fields
| Name | Type | Description |
| ------------------ | ---------------------------------------------------------------------- | ---------------------------------------------------------------------------------------------------------------------- |
| **CookieStorage** | [CookieStorage](/api/wisej.core/general/wisej.core.cookiestorage.md) | Returns an instance of the [CookieStorage](#fields) class that represents the "cookies" storage in the browser. |
| **LocalStorage** | [LocalStorage](/api/wisej.core/general/wisej.core.localstorage.md) | Returns an instance of the [LocalStorage](#fields) class that represents the "localStorage" object in the browser. |
| **SessionStorage** | [SessionStorage](/api/wisej.core/general/wisej.core.sessionstorage.md) | Returns an instance of the [SessionStorage](#fields) class that represents the "sessionStorage" object in the browser. |
## Properties
###  CultureInfo
[CultureInfo](https://docs.microsoft.com/dotnet/api/system.globalization.cultureinfo): Returns the locale declared in the application configuration file or detected from the client browser.
###  Device
[String](https://docs.microsoft.com/dotnet/api/system.string): Device type. Can be one of "Mobile", "Tablet" or "Desktop".
###  Features
[Object](https://docs.microsoft.com/dotnet/api/system.object): Returns the set of features supported/not-supported by the browser. Currently we detect: geolocation, webSocket, fullScreen, speechSynthesis, speechRecognition, notification, fullScreen, browserStorage.
###  IPAddress
[String](https://docs.microsoft.com/dotnet/api/system.string): IP Address of the client computer.
###  IsDarkMode
[Boolean](https://docs.microsoft.com/dotnet/api/system.boolean): Returns true if the browser is using dark mode.Since 3.0.10
###  IsFullScreen
[Boolean](https://docs.microsoft.com/dotnet/api/system.boolean): Returns true if the browser is in full screen mode.
###  IsSecure
[Boolean](https://docs.microsoft.com/dotnet/api/system.boolean): Returns true if the connection is secure.
###  Language
[String](https://docs.microsoft.com/dotnet/api/system.string): Client language.
###  OS
[String](https://docs.microsoft.com/dotnet/api/system.string): Client OS. Can be one of "iOS", "Android", "WebOS", "BlackBerry", "MacOS", "Linux", "Windows", "Unix", "Other".
###  PixelRatio
[Double](https://docs.microsoft.com/dotnet/api/system.double): Returns the ratio of the resolution in physical pixels to the resolution in CSS pixels for the current display device.
###  Profiles
[ClientProfile\[\]](/api/wisej.web/general/application/wisej.core.clientprofile.md):
###  ScreenSize
[Size](https://docs.microsoft.com/dotnet/api/system.drawing.size): Screen size.
###  SessionId
[String](https://docs.microsoft.com/dotnet/api/system.string): Returns the session ID associated with this [ClientBrowser](/api/wisej.web/general/application/wisej.core.clientbrowser.md).
###  Size
[Size](https://docs.microsoft.com/dotnet/api/system.drawing.size): Browser size. This is the window size, which can be different from the device (or screen) size.
###  TabId
[String](https://docs.microsoft.com/dotnet/api/system.string): Identifies the browser tab associated with with this [ClientBrowser](/api/wisej.web/general/application/wisej.core.clientbrowser.md) instance.
###  TimezoneId
[String](https://docs.microsoft.com/dotnet/api/system.string): Returns the current IANA time zone name. See [timezone](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Intl/DateTimeFormat/resolvedOptions#timezone).Since 3.5.12
###  TimezoneInfo
[TimeZoneInfo](https://docs.microsoft.com/dotnet/api/system.timezoneinfo): Returns an instance of [TimeZoneInfo](https://docs.microsoft.com/dotnet/api/system.timezoneinfo) for the current [TimezoneId](#timezoneid). May be null when the IANA time zone id cannot be resolved on the server.Since 3.5.12
###  TimezoneOffset
[Int32](https://docs.microsoft.com/dotnet/api/system.int32): Returns the time difference between UTC time and local time, in minutes.
###  Type
[String](https://docs.microsoft.com/dotnet/api/system.string): Browser type. Can be one of "IE", "Edge", "Chrome", "Opera", "Firefox", "Safari", "Other".
###  UserAgent
[String](https://docs.microsoft.com/dotnet/api/system.string): Returns the raw user agent string of the client browser.
###  UserData
[Object](https://docs.microsoft.com/dotnet/api/system.object): Returns a value or map set by the client when loading the application's first HTML page.
An application can use this property to retrieve a custom value on startup. For example, in Default.html add:
```csharp
```
On the server side, you can retrieve the user data use at any time like this:
```csharp
int value1 = Application.Browser.UserData.value1;
string value2 = Application.Browser.UserData.someName;
```
When used in conjunction with an aspx startup page (Default.aspx) it allows the application to retrieve data passed as a POST request and pass it to the Wisej application.
###  Version
[Int32](https://docs.microsoft.com/dotnet/api/system.int32): Browser version.
## Implements
| Name | Description |
| ------------------------------------------------------------- | --------------------------------------------------------------------------------------------------------------- |
| [IUserData](/api/wisej.web/interfaces/wisej.web.iuserdata.md) | Provides access to the `UserData` and `Tag` properties associated to the component implementing this interface. |
---
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