<ExtensionAttribute> _
Public Shared Function Where(Of TSource) ( _
    source As ParallelQuery(Of TSource), _
    predicate As Func(Of TSource, Boolean) _
) As ParallelQuery(Of TSource)

Dim source As ParallelQuery(Of TSource)
Dim predicate As Func(Of TSource, Boolean)
Dim returnValue As ParallelQuery(Of TSource)

returnValue = source.Where(predicate)

public static ParallelQuery<TSource> Where<TSource>(
    this ParallelQuery<TSource> source,
    Func<TSource, bool> predicate
)

[ExtensionAttribute]
public:
generic<typename TSource>
static ParallelQuery<TSource>^ Where(
    ParallelQuery<TSource>^ source, 
    Func<TSource, bool>^ predicate
)

static member Where : 
        source:ParallelQuery<'TSource> * 
        predicate:Func<'TSource, bool> -> ParallelQuery<'TSource>