ArcGIS Pro 2.7 API Reference Guide
ZoomToAsync(IEnumerable<Layer>,Boolean,Nullable<TimeSpan>,Boolean) Method
Example 

ArcGIS.Desktop.Mapping Namespace > MapView Class > ZoomToAsync Method : ZoomToAsync(IEnumerable<Layer>,Boolean,Nullable<TimeSpan>,Boolean) Method
An enumeration of layers containing the features in which to zoom.
Indicates whether only the selected features for a layer should be used to determine the extent in which to zoom.
The amount of time to navigate the view to the new camera position. If null it uses the default navigation duration.
Indicates if the Pitch and Heading should remain the same after the navigation is completed. If false the Heading will be set to 15.0 and the Pitch will be set to -60.0. This parameter only effects 3D views.
Zoom the view to the extent of one or more layers.
Syntax
Public Overloads Function ZoomToAsync( _
   ByVal layers As IEnumerable(Of Layer), _
   Optional ByVal selectedOnly As Boolean, _
   Optional ByVal duration As Nullable(Of TimeSpan), _
   Optional ByVal maintainViewDirection As Boolean _
) As Task(Of Boolean)

Parameters

layers
An enumeration of layers containing the features in which to zoom.
selectedOnly
Indicates whether only the selected features for a layer should be used to determine the extent in which to zoom.
duration
The amount of time to navigate the view to the new camera position. If null it uses the default navigation duration.
maintainViewDirection
Indicates if the Pitch and Heading should remain the same after the navigation is completed. If false the Heading will be set to 15.0 and the Pitch will be set to -60.0. This parameter only effects 3D views.

Return Value

True if the navigation is completed, false if it was interrupted by another view navigation.
Example
Zoom to the selected layers in the TOC.
public Task<bool> ZoomToTOCSelectedLayersAsync()
{
  //Get the active map view.
  var mapView = MapView.Active;
  if (mapView == null)
    return Task.FromResult(false);

  //Zoom to the selected layers in the TOC
  var selectedLayers = mapView.GetSelectedLayers();
  return mapView.ZoomToAsync(selectedLayers);
}
Requirements

Target Platforms: Windows 10, Windows 8.1

See Also

Reference

MapView Class
MapView Members
Overload List