Tools and Practices

Debugging, unit testing, benchmarking, and clean code principles for writing higher-quality, maintainable software.

Tools and Practices

Writing code is only part of the job; creating quality software requires testing, debugging, and performance measurement. This section covers Visual Studio tips, writing tests with xUnit/NUnit, measuring performance with BenchmarkDotNet, and applying Clean Code principles.

It also covers practical topics such as making API calls with HttpClient and mocking dependencies using Moq.

TL;DR

Debugging: breakpoints, watch windows.
Testing: xUnit, Moq, FluentValidation.
Clean Code + layered architecture.

Debugging Techniques in C#

20 April 2026 • Tools and Practices

Learn debugging techniques in C# using breakpoints, watch windows, and step tools to quickly identify and fix issues.

C# Debugging

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Visual Studio / VS Code Tips for C#

20 April 2026 • Tools and Practices

Learn Visual Studio and VS Code tips for C# to improve productivity with shortcuts, extensions, and efficient workflows.

C# Visual Studio VS Code

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Writing Unit Tests in C# (xUnit, NUnit, MSTest)

20 April 2026 • Tools and Practices

Learn how to write unit tests in C# using xUnit, NUnit, and MSTest to build reliable and maintainable applications.

C# NUnit Testing xUnit

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Using Mock Frameworks in C# (Moq, NSubstitute)

4 May 2026 • Tools and Practices

Learn how to use mock frameworks like Moq and NSubstitute in C# to isolate dependencies and write effective unit tests.

C# Testing

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Using Benchmarking in C# (BenchmarkDotNet)

4 May 2026 • Tools and Practices

Learn benchmarking in C# using BenchmarkDotNet to measure performance and optimize your code with accurate metrics.

C# Testing

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Using FluentValidation in C#

4 May 2026 • Tools and Practices

Learn FluentValidation in C# to define clean and maintainable validation rules for models and application inputs.

C# Testing

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Clean Code Principles with C#

11 May 2026 • Tools and Practices

Learn clean code principles with C# to write readable, maintainable, and scalable applications with practical examples.

C# Clean Code

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Layered Architecture and Clean Architecture in C#

11 May 2026 • Tools and Practices

Learn layered architecture and Clean Architecture in C# to build maintainable, testable, and well-structured applications.

C# Clean Architecture

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Networking in C# (TcpClient, HttpClient, REST API Calls)

11 May 2026 • Tools and Practices

Learn networking in C# using TcpClient, HttpClient, and REST API calls to handle communication and external data exchange.

C# HttpClient Networking

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In C#, when you have many conditions, using a Dictionary instead of a long switch statement can make the code easier to read and maintain.


// switch-based approach
string GetRoleName(int roleId)
{
    switch (roleId)
    {
        case 1: return "Admin";
        case 2: return "Editor";
        case 3: return "User";
        default: return "Unknown";
    }
}

// Dictionary-based approach
var roles = new Dictionary<int, string>
{
    { 1, "Admin" },
    { 2, "Editor" },
    { 3, "User" }
};

string roleName = roles.TryGetValue(roleId, out var name)
    ? name
    : "Unknown";

In C#, use string.IsNullOrWhiteSpace() to check text values instead of checking only for null or empty strings.


// Risky checks
if (text == null || text == "")
{
    Console.WriteLine("Invalid text");
}

// Safe and recommended check
if (string.IsNullOrWhiteSpace(text))
{
    Console.WriteLine("Invalid text");
}

In C#, use a for loop instead of foreach when you need the index or when you need to modify the collection safely.


// foreach: index bilgisi yok
foreach (var item in items)
{
    Console.WriteLine(item);
}

// for: index gerektiğinde
for (int i = 0; i < items.Count; i++)
{
    Console.WriteLine($"{i}: {items[i]}");
}

// for: eleman silme gibi durumlarda daha güvenli
for (int i = items.Count - 1; i >= 0; i--)
{
    items.RemoveAt(i);
}

In C#, you can use using var to manage disposable resources in a shorter and more readable way when the scope is clear.


// Classic using block
using (var stream = new FileStream(path, FileMode.Open))
{
    // use stream
}

// using var (recommended for short scopes)
using var stream2 = new FileStream(path, FileMode.Open);
// use stream2

In C#, use Any() instead of checking Count > 0 to see if a collection contains items. This is more readable and often more efficient.


// Less readable
if (items.Count > 0)
{
    Console.WriteLine("Items exist");
}

// Recommended
if (items.Any())
{
    Console.WriteLine("Items exist");
}