/// <summary>
/// Removes a set of objects from a collection based on a specific property value
/// </summary>
/// <typeparam name="T">The collection type</typeparam>
/// <typeparam name="TValue">The type of the property to compare</typeparam>
/// <param name="source">The source collection</param>
/// <param name="second">The collection of objects to be excluded</param>
/// <param name="projection">The selector function for the distinction property</param>
/// <returns>The collection without the specified elements</returns>
public static IEnumerable <T> Except <T, TValue>(this IEnumerable <T> source, IEnumerable <T> second, Func <T, TValue> projection)
{
return(source.Except(second, GenericEqualityComparer <T> .Create(projection)));
}
/// <summary>
/// Determines object distinction purely based on a specified property (i.e. not object equality comparison)
/// </summary>
/// <typeparam name="T">The collection type</typeparam>
/// <typeparam name="TValue">The type of the property to compare</typeparam>
/// <param name="source">The source collection</param>
/// <param name="projection">The selector function for the distinction property</param>
/// <returns>The distinct collection</returns>
public static IEnumerable <T> Distinct <T, TValue>(this IEnumerable <T> source, Func <T, TValue> projection)
{
return(source.Distinct(GenericEqualityComparer <T> .Create(projection)));
}
