Determines whether the existing Silverlight plug-in matches or is compatible with a specified version string.
true if the existing Silverlight plug-in matches or is compatible with the specified version string; otherwise, false.
The versionString parameter contains four integer values that are separated by dots, following the format: major.minor.build.revision (for example, "1.0.50232.0"). The sequence of integers represent the following Silverlight version values:
The major version number.
The minor version number.
The build number.
The revision number.