iequalitycomparer

C# – Remove items from a list

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Here are the different ways to remove items from a list: I’ll show examples of using these methods. Remove item by index with List.RemoveAt() You can use List.RemoveAt() to remove an item at an index (0-based). Here’s an example of removing the first and last item from the list: This removes the first item “A” … Read more

C# – How to implement GetHashCode() and Equals()

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The simplest way to implement GetHashCode() is to use the built-in System.HashCode.Combine() method and pick the properties you want to include. Let it do the work for you. Furthermore, the simplest way to implement Equals() is to use the is operator and compare all the properties. Here’s an example: Note: Use (Title, Year).GetHashCode() in versions … Read more

C# – Select distinct objects based on a property with Linq

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There are three ways to select distinct objects based on a property using Linq methods: These select one movie per year: The simplest option is using GroupBy() because it doesn’t require any additional code. Distinct() is faster but it’s more complicated. DistinctBy() is the fastest and simplest, but requires the most code (it requires .NET … Read more