public: IEnumerable<TResult> FullOuterJoin<TOuter, TInner, TKey, TResult>( this IEnumerable<TOuter> outer, IEnumerable<TInner> inner, Func<TOuter, TKey> outerKeySelector, Func<TInner, TKey> innerKeySelector, Func<TOuter, TInner, TResult> resultSelector );

public static IEnumerable<TResult> FullOuterJoin<TOuter, TInner, TKey, TResult>( this IEnumerable<TOuter> outer, IEnumerable<TInner> inner, Func<TOuter, TKey> outerKeySelector, Func<TInner, TKey> innerKeySelector, Func<TOuter, TInner, TResult> resultSelector ) where TInner : class where TOuter : class;

Public static Function FullOuterJoin(Of TOuter, TInner, TKey, TResult)( outer As this IEnumerable<TOuter>, inner As IEnumerable<TInner>, outerKeySelector As Func<TOuter, TKey>, innerKeySelector As Func<TInner, TKey>, resultSelector As Func<TOuter, TInner, TResult> ) As IEnumerable<TResult>