<ExtensionAttribute()>
Public Overloads Shared Function Count( _
   ByVal source As ITypedEntityQuery _
) As Integer

Dim source As ITypedEntityQuery
Dim value As Integer
 
value = EntityQueryExtensions.Count(source)

[ExtensionAttribute()]
public static int Count( 
   ITypedEntityQuery source
)

[ExtensionAttribute()]
public:
static int Count( 
   ITypedEntityQuery^ source
) 

var mgr1 = new DomainModelEntityManager();

var entityType = typeof(Customer);
var baseQuery = EntityQuery.Create(entityType);
var count = baseQuery.Count();