Gets the version of the .NET Framework that is installed on the client.
Assembly: System.Web (in System.Web.dll)
The property is supported only when the browser is Internet Explorer version 5.0 and later.
If the .NET Framework is not installed on the client, the value of the version elements returned is 0, 0,-1,-1.
If more than one version of the .NET Framework is installed on the client, the property returns the latest version.