What are some advanced LINQ techniques in C#?

What are some advanced LINQ techniques in C#?

Advanced LINQ techniques include using GroupBy, Join, and Aggregate methods, as well as custom LINQ extensions.

Can you explain how to use GroupBy with a real example?

Sure! You can use GroupBy to group a collection of objects. For example, if you have a list of students, you can group them by their grades.

How would I write a custom LINQ extension method?

To create a custom LINQ extension method, define a static class and a static method with the 'this' keyword in the first parameter.

What are some performance considerations when using LINQ?

Performance considerations include avoiding multiple enumerations, using deferred execution wisely, and being cautious with large datasets.