DataExtensions.ToHashSet<T, TSource> Method (IEnumerable<TSource>, Func<TSource, T>, IEqualityComparer<T>)

Note: This API is now obsolete.

Converts the list of objects to a hash set of distinct values

Namespace: CMS.DataEngine
Assembly: CMS.DataEngine (in CMS.DataEngine.dll) Version: 9.0.0

Syntax

[ObsoleteAttribute("This method is obsolete. Use LINQ Select and then ToHashSet(IEnumerable<T>, IEqualityComparer<T>) overload.")]
public static HashSet<T> ToHashSet<T, TSource>(
	this IEnumerable<TSource> objects,
	Func<TSource, T> transform,
	IEqualityComparer<T> comparer = null
)
where T : class

Parameters

objects

Type: System.Collections.Generic.IEnumerable<TSource>
List of objects to convert

transform

Type: System.Func<TSource, T>
Function to transform the object to hash set item. When returns null, the object is not added to the result

comparer (Optional)

Type: System.Collections.Generic.IEqualityComparer<T>
Comparer

Type Parameters

T

TSource

Return Value

Type: HashSet<T>

Usage Note

In Visual Basic and C#, you can call this method as an instance method on any object of type IEnumerable<TSource>. When you use instance method syntax to call this method, omit the first parameter. For more information, see Extension Methods (Visual Basic) or Extension Methods (C# Programming Guide).