The RuntimeAvailable property checks whether the Microsoft
Edge WebView2 runtime is installed and meets the minimum required version
for the control. If the runtime is available, the property returns
True; otherwise, it returns False. Developers can check this property
when the control is created dynamically, or from within the
Initialize event, to ensure that the local system has the runtime
installed.
On modern versions of Windows, the WebView2 runtime is included as
part of the operating system and is serviced through Windows Update.
However, on older or unsupported versions of Windows the runtime may
not be present by default and must be installed separately. In these
cases, your application needs to detect the missing runtime and prompt
the user to install it.
The latest WebView2 runtime version officially supported on Windows 7
and Windows 8/8.1 is version 109.0.1518.140, released January 2023.
After version 109, no further updates, new features, or fixes have
been provided for those operating systems. Although this control
supports Windows 7 and Windows 8, these platforms are not recommended
because they no longer receive security updates for the browser.