Public Overloads Sub AddFilter(Of T As Class)( _
   ByVal transformFunc As Func(Of IQueryable(Of T),IQueryable(Of T)), _
   Optional ByVal canReplaceIfAlreadyExists As Boolean _
) 

Dim instance As EntityQueryFilterCollection
Dim transformFunc As Func(Of IQueryable(Of T),IQueryable(Of T))
Dim canReplaceIfAlreadyExists As Boolean
 
instance.AddFilter(Of T)(transformFunc, canReplaceIfAlreadyExists)

public void AddFilter<T>( 
   Func<IQueryable<T>,IQueryable<T>> transformFunc,
   bool canReplaceIfAlreadyExists
)
where T: class

public:
void AddFiltergeneric<typename T>
( 
   Func<IQueryable<T^>^,IQueryable<T^>^>^ transformFunc,
   bool canReplaceIfAlreadyExists
) 
where T: ref class

public void FilteringSample() {
  // Query for all customers.  A filter will be applied prior to execution.
  var mgr = new DomainModelEntityManager();
  var list = mgr.Customers.ToList();
}

// Server-side implementation of EntityServerQueryInterceptor
public class EntityServerQueryManager : EntityServerQueryInterceptor {

  protected override bool FilterQuery()
    // Add filters
    QueryFilters.AddFilter<Customer>(q => q.Where(c => c.Country == "USA"));
    QueryFilters.AddFilter<Employee>(q => q.Where(e => e.Country == "USA"));
    return true;
	}
}