public static ProjectionDefinition<TDocument> ElemMatch<TDocument, TItem>(
	this ProjectionDefinition<TDocument> projection,
	Expression<Func<TDocument, IEnumerable<TItem>>> field,
	FilterDefinition<TItem> filter
)

<ExtensionAttribute>
Public Shared Function ElemMatch(Of TDocument, TItem) ( 
	projection As ProjectionDefinition(Of TDocument),
	field As Expression(Of Func(Of TDocument, IEnumerable(Of TItem))),
	filter As FilterDefinition(Of TItem)
) As ProjectionDefinition(Of TDocument)

[<ExtensionAttribute>]
static member ElemMatch : 
        projection : ProjectionDefinition<'TDocument> * 
        field : Expression<Func<'TDocument, IEnumerable<'TItem>>> * 
        filter : FilterDefinition<'TItem> -> ProjectionDefinition<'TDocument>