ArcGIS Pro 2.7 API Reference Guide
Intersection Method (EnvelopeBuilder)
Example 

ArcGIS.Core.Geometry Namespace > EnvelopeBuilder Class : Intersection Method
The envelope to intersect with.
Intersects the envelope with the EnvelopeBuilder. This method must be called on the MCT. Use QueuedTask.Run.
Syntax
public Envelope Intersection( 
   Envelope envelope
)
Public Function Intersection( _
   ByVal envelope As Envelope _
) As Envelope

Parameters

envelope
The envelope to intersect with.

Return Value

The intersecting Envelope
Exceptions
ExceptionDescription
This method or property must be called within the lambda passed to QueuedTask.Run.
Remarks
Sets the EnvelopeBuilder equal to the intersection of the base Envelope and the input Envelope. The XMin and YMin of the resulting EnvelopeBuilder is the maximum XMin and YMin respectively between the base and input Envelopes, and the XMax and YMax of the resulting Envelope is the minimum XMax and YMax respectively between the base and input Envelopes. If the resulting XMin > XMax, or YMin > YMax, then the Envelope is Empty (and all XMin, XMax, YMin, and YMax are undefined.).

Intersect

Example
// use the convenience builders - don't need to run on the MCT.
Envelope env1 = EnvelopeBuilder.CreateEnvelope(0, 0, 1, 1, SpatialReferences.WGS84);
Envelope env2 = EnvelopeBuilder.CreateEnvelope(0.5, 0.5, 1.5, 1.5, SpatialReferences.WGS84);

bool intersects = env1.Intersects(env2); // true
Envelope env3 = env1.Intersection(env2);


// or use the builder constructor - need to run on the MCT.
using (var builder = new EnvelopeBuilder(0, 0, 1, 1, SpatialReferences.WGS84))
{
  intersects = builder.Intersects(env2);  // true
  env3 = builder.Intersection(env2);
}

// or use the builderEx constructors = don't need to run on the MCT.
EnvelopeBuilderEx builderEx = new EnvelopeBuilderEx(0, 0, 1, 1, SpatialReferences.WGS84);
intersects = builderEx.Intersects(env2);
builderEx.Intersection(env2);   // note this sets the builder to the intersection
env3 = builderEx.ToGeometry() as Envelope;
Requirements

Target Platforms: Windows 10, Windows 8.1

See Also

Reference

EnvelopeBuilder Class
EnvelopeBuilder Members
Intersects Method