Queryable::Concat<TSource> Method
Concatenates two sequences.
Namespace: System.Linq
Assembly: System.Core (in System.Core.dll)
Type Parameters
- TSource
The type of the elements of the input sequences.
Parameters
- source1
- Type: System.Linq::IQueryable<TSource>
The first sequence to concatenate.
- source2
- Type: System.Collections.Generic::IEnumerable<TSource>
The sequence to concatenate to the first sequence.
Return Value
Type: System.Linq::IQueryable<TSource>An IQueryable<T> that contains the concatenated elements of the two input sequences.
Usage Note
In Visual Basic and C#, you can call this method as an instance method on any object of type IQueryable<TSource>. When you use instance method syntax to call this method, omit the first parameter.| Exception | Condition |
|---|---|
| ArgumentNullException | source1 or source2 is nullptr. |
The Concat<TSource>(IQueryable<TSource>, IEnumerable<TSource>) method generates a MethodCallExpression that represents calling Concat<TSource>(IQueryable<TSource>, IEnumerable<TSource>) 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.
The query behavior that occurs as a result of executing an expression tree that represents calling Concat<TSource>(IQueryable<TSource>, IEnumerable<TSource>) depends on the implementation of the type of the source1 parameter. The expected behavior is that the elements in source2 are concatenated to those of source1 to create a new sequence.
For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.