Gets or sets a boolean that indicates if the value of CustomTrendStoreDirectory is used to define the directory that stores Trend Metrics Values, or if the default path $(NdProjectOutputDir)\TrendMetrics is used instead..
When the property is changed, the event IProject.IProject.SettingsChanged is triggered with the flag ProjectSettings.ProjectSettings.Trend_Settings activated.

bool UseCustomTrendStoreDirectory {get; set;}