Mosh Hamedani C# Intermediate Exercises

Welcome to the Mosh Hamedani C# Intermediate Exercises repository! This project contains hands-on implementations of key object-oriented programming principles and .NET concepts, helping you solidify your understanding through real-world examples.

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🚀 Features

• Abstraction & Encapsulation: Exercises like StopWatch and StackOverflowPost classes demonstrate clean interfaces and controlled access to internal state.
• Inheritance & Polymorphism: Custom implementations of Stack (LIFO) and database connections (DbConnection, MsSqlConnection, OracleConnection) showcase class hierarchies and dynamic behavior.
• Interfaces & Design Principles: A flexible WorkflowEngine and IActivity interfaces illustrate SOLID principles (Single Responsibility, Open/Closed, Interface Segregation).
• Robust Error Handling: Consistent use of exceptions and validation for safe, predictable execution.
• Interactive Console Menu: Choose and run exercises interactively via Program.cs.

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📂 Project Structure

├── src/
│   ├── StopWatch.cs            # Simulates a stopwatch with Start, Stop, Reset
│   ├── StackOverflowPost.cs    # Models a StackOverflow post with voting
│   ├── Stack_LIFO.cs           # Implements a generic LIFO stack
│   ├── DbConnection.cs         # Abstract DB connection and command execution
│   ├── WorkflowEngine.cs       # Defines workflows and activities via interfaces
│   └── Program.cs              # Console entry point with menu to run exercises
├── App.config                  # Configuration for database examples
└── MoshHamedani_Csharp_imtermediate.sln

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🔧 Prerequisites

• .NET Framework: 4.7.2
• IDE: Visual Studio 2022 or later (Windows)

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🏁 Getting Started

1. Clone the repository

   git clone https://github.com/your-username/MoshHamedani-CSharp-Intermediate.git

2. Open the solution file in Visual Studio:

   cd MoshHamedani-C-Sharp-Intermediate
   MoshHamedani_Csharp_imtermediate.sln

3. Build the solution (ensure targeting .NET Framework 4.7.2).
4. Run the application (F5). You will see a menu prompting you to select an exercise.

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🎯 Usage

Upon running, enter the corresponding number to execute an exercise:

Option	Exercise
1	StopWatch demo (abstraction, TimeSpan)
2	StackOverflowPost demo (encapsulation, properties)
3	Custom Stack (LIFO) demo (inheritance, data structures)
4	DbConnection & DbCommand demo (polymorphism, DB IO)
5	WorkflowEngine demo (interfaces, SOLID principles)

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🤝 Contributing

Contributions are welcome! Feel free to:

• Add new exercises or improve existing ones.
• Enhance exception handling and test coverage.
• Submit pull requests with clear descriptions and use cases.

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📄 License

This project is for educational purposes. Feel free to use and adapt the code for your own learning.

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Need any additional details or tweaks? Let me know!