What are the first concepts of Object-Oriented Programming (OOP), the SOLID principles, and their implementation? Additionally, can you explain two design patterns theoretically and describe how you have utilized them in your work, including their structure in a real-world context. Additionally fancy questions about c# like dictionary etc. and their uses in real world. A Few scenario based questions which I do not remember.

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Understanding OOP concepts, SOLID principles, design patterns, and C# features for software engineering.

OOP concepts include encapsulation, inheritance, polymorphism, and abstraction.
SOLID principles consist of Single Responsibility, Open/Closed, Liskov Substitution, Interface Segregation, and Dependency Inversion.
Design patterns like Singleton and Factory Method are commonly used in software development.
In real-world context, Singleton pattern ensures a class has only one instance, while Factory Method pattern creates objects without specifying the exact class.
C# features like Dictionary are used for key-value pair storage and quick data retrieval in applications.
Scenario-based questions may involve designing a system using OOP principles, implementing SOLID design, and utilizing design patterns effectively.

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