Linq SelectMany Multiple Columns – C# Programming Example
Collection Linq

Linq SelectMany Multiple Columns

The SelectMany operator creates a one-to-many output projection sequence over an input sequence. SelectMany will return 0 or more output elements for every input element.

We’ll need some classses which have some properies. In the posts on LINQ we take the following collections for tutorial

 

Create the following classes:

 

We can create a join with the SelectMany operator to see books’ name with authors . Consider the following query:

 

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