public override string ChartDirectory { get; set; }

Public Overrides Property ChartDirectory As String

public:
virtual property String^ ChartDirectory {
	String^ get () override;
	void set (String^ value) override;
}

Default amradar.swf location is "~/amcharts/amradar/". In case you have the file located in some other directory you can override it here or set "amradar_dir" AppSetting in web.config file. You can also set "amcharts_dir" AppSetting if the file is located in "amradar" subdirectory but not under "~/amcharts" dir