ArcGIS Pro 3.4 API Reference Guide
ArcGIS.Core.Data Namespace / Table Class / GetCount Method / GetCount() Method
Example Version

GetCount() Method
Gets the count of how many rows are currently in this Table. This method must be called on the MCT. Use QueuedTask.Run.
Syntax
public long GetCount()

Return Value

The number of rows in this table.
Exceptions
ExceptionDescription
A geodatabase-related exception has occurred.
Example
Gets the count of how many rows are currently in a Table
//Note: call within QueuedTask.Run()
Table table = featureLayer.GetTable();
long count = table.GetCount();
Gets the feature count of a layer
FeatureLayer lyr = MapView.Active.Map.GetLayersAsFlattenedList().OfType<FeatureLayer>().FirstOrDefault();
QueuedTask.Run(() =>
{
    FeatureClass featureClass = lyr.GetFeatureClass();
    long nCount = featureClass.GetCount();
});
Requirements

Target Platforms: Windows 11, Windows 10

ArcGIS Pro version: 3 or higher.
See Also