C# Module 4:- CRUD SQL

What you'll learn

• Perform file handling using File, FileInfo, StreamReader, and StreamWriter
• Use asynchronous file operations for better performance
• Handle exceptions effectively, including custom exceptions
• Apply best practices using finally and using blocks
• Understand SQL fundamentals (CRUD operations)
• Connect C# applications to databases (SQL Server Express / SQLite)
• Execute CRUD operations using SqlConnection and SqlCommand
• Prevent SQL injection using parameters

This course includes:

• 4 Practical Coding Sessions
• 12–16 Hours Live Classes
• Online / Onsite (Physical)
• Practice Code Files
• Database Exercises
• Certificate of Completion

Course Content

File Handling

• File and FileInfo Classes
• Reading Files using StreamReader
• Writing Files using StreamWriter
• Async File Methods (ReadAsync, WriteAsync)
• File Handling Best Practices

Exception Management

• Exception Handling Basics
• try, catch, finally Blocks
• Creating Custom Exceptions
• using Statement (Resource Management)
• Writing Robust and Safe Code

Basic SQL (CRUD)

• Introduction to Databases
• SELECT (Read Data)
• INSERT (Create Data)
• UPDATE (Modify Data)
• DELETE (Remove Data)
• Connecting to SQL Server Express / SQLite

CRUD in C#

• SqlConnection Setup
• SqlCommand Usage
• Executing Queries from C#
• Using Parameters to Prevent SQL Injection
• Handling Database Errors

Practice Projects for Real-World Skills

• File-Based Notes Manager
• Custom Exception Demo Application
• Student Database CRUD System
• Login System with Database Validation

Requirements

• Completion of C# Modules 1–3
• Understanding of OOP and basic .NET concepts
• Laptop/PC with Visual Studio and database setup

Description

This module focuses on data handling and reliability in C# applications. Students will learn how to read and write files, manage exceptions safely, and connect applications to databases.

By combining file handling with database operations, learners gain practical skills required for real-world software development.

Why Choose This Course?

• Real-World Data Handling Skills
• Database Integration with C#
• Secure Coding Practices
• Hands-On Projects
• Prepares for Backend Development

Activities During Class

• Reading and writing files
• Handling exceptions and debugging
• Writing SQL queries
• Connecting C# to databases
• Performing CRUD operations

Who Is This Course For?

• Students who completed C# Modules 1–3
• Learners progressing toward backend development
• Students interested in database-driven applications

Course Highlights

• File Handling Mastery
• Exception Handling Skills
• Database Integration
• Practical Coding Exercises
• Certificate of Completion