linq-union

C# – Set operations with Linq

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In this article, I’ll explain four set operations – intersection, union, difference, and symmetric difference – and how to perform these operations using Linq methods (such as Intersect()). These methods work on any type that implements IEnumerable – such as lists, arrays, and sets. Set intersection with Intersect() The intersection of set A {1,2} and … Read more

C# – Merge two dictionaries in-place

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When you merge two dictionaries, you can either merge them in-place, or create a new dictionary and copy the values over to it. The following extension method does an in-place merge of two dictionaries. It loops through items in the right dictionary, adding them to the left dictionary. When duplicate keys exist, it’s keeping the … Read more