Debugging in C#

▪Debugging is the process of identifying, analyzing, and removing errors (bugs) in software.

▪Essential for ensuring software quality and reliability.

▪Types of Bugs

•Syntax Errors: Mistakes in the use of the programming language.

•Runtime Errors: Errors that occur during the execution of the program.

•Logic Errors: Errors in the algorithm or logic that produce incorrect results.

Debugging Techniques

▪Manual Debugging: Reviewing code line-by-line to find errors.

▪Print Statements: Using Console.WriteLine to output variable values and program flow.

▪Debugger Tools: Using an Integrated Development Environment (IDE) like Visual Studio.

▪Breakpoints: Pausing the execution at specific points to inspect the state.

Best Practices for Debugging

Isolate the Problem: Narrow down the code area where the bug occurs.

Understand the Code: Thoroughly understand the code and its expected behavior.

Use Version Control: Keep track of code changes to identify when bugs were introduced.

Write Test Cases: Create tests to cover different scenarios and edge cases.

Common Debugging Scenarios in C#

▪NullReferenceException: Occurs when trying to access an object that is null.

▪IndexOutOfRangeException: Accessing an array or collection with an invalid index.

▪InvalidCastException: Improper casting of objects.

▪OutOfMemoryException: Running out of memory during execution.

▪SqlClient.SqlException: This exception is usually caused by an execution query that contains syntax errors, or when there’s an invalid column name, table name, or stored procedure name in the query.