SpatialRelationship Enumeration

public enum SpatialRelationship : System.Enum, System.IComparable, System.IConvertible, System.IFormattable

Public Enum SpatialRelationship 
   Inherits System.Enum
   Implements System.IComparable, System.IConvertible, System.IFormattable

Member	Description
Contains	The filter geometry wholly contains within it a feature from the target feature class.
Crosses	The filter geometry crosses a feature from the target feature class.
EnvelopeIntersects	The envelope of the filter geometry intersects with the envelope of a feature in the target feature class.
IndexIntersects	The envelope of the filter geometry intersects with the index entry for a feature in the target feature class.
Intersects	The filter geometry intersects a feature from the target feature class.
Overlaps	The filter geometry overlaps a feature in the target feature class.
Touches	The filter geometry touches a feature in the target feature class.
Undefined	No defined spatial relationship.
Within	The filter geometry is within a feature in the target feature class.

Intersects - Returns a feature if any spatial relationship is found.
EnvelopeIntersects - Returns a feature if the envelope of the two shapes intersect.
Contains - Returns a feature if its shape is wholly contained within the search geometry. Valid of all shape type combinations.
Crosses - Returns a feature if the intersection of the interiors of the two shapes is not empty and has a lower dimension that the maximum dimension of the two shapes. Two lines that share an endpoint do not cross. Valid for polyline/polyline, polyline/Area, multipoint/Area, and multipoint/polyline shape type combinations.
IndexIntersects uses the underlying index grid of the target feature class which is faster than using the envelope of the features, and is often used to return features for display purposes.
Overlaps - Returns a feature if the intersection of the two shapes results in an object of the same dimension, but different from both of the shapes. Applies to Area/Area, polyline/polyline, and multipoint/multipoint shape type combinations.
Touches - Returns a feature if the two shapes share a common boundary. However, the intersection of the interiors of the two shapes must be empty. In the point/polyline case, the point may touch an endpoint only of the polyline. Applies to all combinations except for point/point.
Within - Returns a feature if its shape wholly contains the search geometry. Valid for all shape type combinations.

System.Object
   System.ValueType
      System.Enum
         ArcGIS.Core.Data.SpatialRelationship

Target Platforms: Windows 10, Windows 8.1