Please explain C#OOP Concept

Question

Hi, I'm a new developer. please explain below queries with a sample project please and thanks

• List the OOPS in c#.
• Explain the access modifiers and the modifiers are how to protect data.
• what is a property (get; set;) please explain.
• what is the difference between LINQ and lambda expression?
• how to get a large amount of data from the database properly.