Queryable.Union<TSource> Method (IQueryable<TSource>, IEnumerable<TSource>, IEqualityComparer<TSource>)
Produces the set union of two sequences by using a specified IEqualityComparer<T>.
Assembly: System.Core (in System.Core.dll)
public static IQueryable<TSource> Union<TSource>( this IQueryable<TSource> source1, IEnumerable<TSource> source2, IEqualityComparer<TSource> comparer )
A sequence whose distinct elements form the first set for the union operation.
A sequence whose distinct elements form the second set for the union operation.
Return ValueType: System.Linq.IQueryable< >
An IQueryable<T> that contains the elements from both input sequences, excluding duplicates.
The type of the elements of the input sequences.
The MethodCallExpression that represents calling itself as a constructed generic method. It then passes the MethodCallExpression to the CreateQuery<TElement>(Expression) method of the IQueryProvider represented by the Provider property of the source1 parameter.method generates a
The query behavior that occurs as a result of executing an expression tree that represents callingdepends on the implementation of the type of the source1 parameter. The expected behavior is that the set union of the elements in source1 and source2 is returned. The comparer parameter is used to compare values.
Available since 8
Available since 3.5
Portable Class Library
Supported in: portable .NET platforms
Available since 2.0
Windows Phone Silverlight
Available since 7.1
Available since 8.1