.NET to Swift

Free .NET to Swift Code Converter

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Transform your code from .NET to Swift with our free AI-based code convertion tool. If you like what you see, we also create documentation for your code! We don't ever store your code or any representation of it in our databases, but it will be shared with the LLM of our choice for processing.

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How to convert from .NET to Swift

Converting a project from .NET to Swift can be a complex process, particularly for developers proficient in .NET but new to Swift. This guide provides a comprehensive overview of the conversion process to help you understand and implement the necessary changes.

Understanding the Differences

.NET Overview

.NET is a popular framework developed by Microsoft, primarily used for building Windows applications. It supports multiple languages, including C#. .NET is object-oriented and provides a rich library for robust application development.

Swift Overview

Swift, developed by Apple, is a powerful and intuitive programming language for iOS, macOS, watchOS, and tvOS. Swift promotes safe, fast, and expressive code, integrating modern programming concepts like optionals and pattern matching.

Setting Up Your Environment

Requirements for Swift Development

Before converting your .NET code to Swift, ensure you have the necessary tools:

  • Xcode: Apple's integrated development environment (IDE) for macOS.
  • Cocoa Framework: Provides APIs for macOS and iOS development.

Conversion Strategies

Translating Core Concepts

  1. Namespaces vs. Modules:

    • .NET uses namespaces to organize code.
    • Swift uses modules, which are similar but may require a different organizational approach.
  2. Classes and Structs:

    • .NET often uses classes for data structures.
    • Swift provides both classes and structs. Utilize structs for value types and classes for reference types.
  3. Properties and Methods:

    • .NET properties can be auto-implemented or have custom logic.
    • Swift properties can also be stored or computed, with getters and setters.

Practical Examples

  1. Class Definition:

    .NET (C#):

    public class Person
        public string Name { get; set; }
        public int Age { get; set; }
        public void Greet()
            Console.WriteLine($"Hello, my name is {Name}");


    class Person {
        var name: String
        var age: Int
        init(name: String, age: Int) {
            self.name = name
            self.age = age
        func greet() {
            print("Hello, my name is \(name)")
  2. Handling Collections:

    .NET (C#):

    List<string> names = new List<string> { "Alice", "Bob", "Eve" };
    foreach (var name in names)


    let names = ["Alice", "Bob", "Eve"]
    for name in names {

Advanced Topics

Memory Management

.NET uses a garbage collector for automatic memory management, whereas Swift uses Automatic Reference Counting (ARC). This means you need to manage strong and weak references to avoid retain cycles in Swift.

Asynchronous Programming

  1. .NET (C#) - Async/Await:

    public async Task<string> FetchDataAsync()
        var client = new HttpClient();
        var response = await client.GetStringAsync("https://example.com");
        return response;

    Swift - Async/Await:

    func fetchData() async -> String? {
        guard let url = URL(string: "https://example.com") else { return nil }
        do {
            let (data, _) = try await URLSession.shared.data(from: url)
            return String(data: data, encoding: .utf8)
        } catch {
            return nil

Testing and Debugging

Swift has excellent testing support integrated into Xcode. You can write unit tests using the XCTest framework, similar to NUnit or MSTest in .NET.

import XCTest

class MyTests: XCTestCase {
    func testExample() {
        let person = Person(name: "Alice", age: 30)
        XCTAssertEqual(person.name, "Alice")


Transitioning from .NET to Swift requires understanding language differences and adapting your code to fit the paradigms of Swift development. With this guide, you have an initial roadmap for converting your .NET code to Swift, from setting up your environment to translating core concepts and advanced features.

Keep practicing, and soon you'll be proficient in both .NET and Swift, effectively bridging these two powerful programming ecosystems. Happy coding!

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