Lambda Function in C#(C-Sharp) how many way to use it?

Question

I have no ideas for '=>' mark in C# and literary don't know how to use of this for manual professional keywords.
Can anyone give me a help?
Thanks

Answer 1

I hope, it helps. Happy coding!

https://www.c-sharpcorner.com/UploadFile/vendettamit/beginners-guide-to-lambda-expressions/

Answer 2

Many thanks