ArcGIS Pro 2.8 API Reference Guide
GetPredefinedGeographicTransformationList Method (IGeometryEngine)
Example 

ArcGIS.Core.Geometry Namespace > IGeometryEngine Interface : GetPredefinedGeographicTransformationList Method
Gets the list of predefined geographic transformations.
Syntax
IReadOnlyList<GeographicTransformationListEntry> GetPredefinedGeographicTransformationList()
Function GetPredefinedGeographicTransformationList() As IReadOnlyList(Of GeographicTransformationListEntry)

Return Value

Example
// a geographic transformation is the definition of how to project from one spatial reference to another
IReadOnlyList<GeographicTransformationListEntry> list = GeometryEngine.Instance.GetPredefinedGeographicTransformationList();

// a GeographicTransformationListEntry consists of Name, Wkid, the From SpatialReference Wkid, the To SpatialReference Wkid
GeographicTransformationListEntry entry = list[0];

int fromWkid = entry.FromSRWkid;
int toWkid = entry.ToSRWkid;
int wkid = entry.Wkid;
string name = entry.Name;
Requirements

Target Platforms: Windows 10, Windows 8.1

See Also

Reference

IGeometryEngine Interface
IGeometryEngine Members