IndexKeysBuilderTDocumentGeoSpatialHaystackTMember, TAdditionalMember Method (ExpressionFuncTDocument, TMember, ExpressionFuncTDocument, TAdditionalMember) | 
 Note: This API is now obsolete.
            Sets the key name and additional field name to create a geospatial haystack index on.
            
 
    Namespace: 
   MongoDB.Driver.Builders
    Assembly:
   MongoDB.Driver.Legacy (in MongoDB.Driver.Legacy.dll) Version: 2.19.1+3a2a09dd959482f665ffbb5df2557ec541597af4
Syntax[ObsoleteAttribute("GeoHaystack indexes were deprecated in server version 4.4.")]
public IndexKeysBuilder<TDocument> GeoSpatialHaystack<TMember, TAdditionalMember>(
	Expression<Func<TDocument, TMember>> memberExpression,
	Expression<Func<TDocument, TAdditionalMember>> additionalMemberExpression
)
<ObsoleteAttribute("GeoHaystack indexes were deprecated in server version 4.4.")>
Public Function GeoSpatialHaystack(Of TMember, TAdditionalMember) ( 
	memberExpression As Expression(Of Func(Of TDocument, TMember)),
	additionalMemberExpression As Expression(Of Func(Of TDocument, TAdditionalMember))
) As IndexKeysBuilder(Of TDocument)[<ObsoleteAttribute("GeoHaystack indexes were deprecated in server version 4.4.")>]
member GeoSpatialHaystack : 
        memberExpression : Expression<Func<'TDocument, 'TMember>> * 
        additionalMemberExpression : Expression<Func<'TDocument, 'TAdditionalMember>> -> IndexKeysBuilder<'TDocument> 
Parameters
- memberExpression
 - Type: System.Linq.ExpressionsExpressionFuncTDocument, TMember
The member expression. - additionalMemberExpression
 - Type: System.Linq.ExpressionsExpressionFuncTDocument, TAdditionalMember
The additional member expression. 
Type Parameters
- TMember
 - The type of the member.
 - TAdditionalMember
 - The type of the additional member.
 
Return Value
Type: 
IndexKeysBuilderTDocument
            The builder (so method calls can be chained).
            
See Also