Swift to .NET

Free Swift to .NET Code Converter

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Transform your code from Swift to .NET 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 Swift to .NET

When approaching the task of converting code from Swift to .NET, it's essential to first understand the fundamental differences and similarities between these two technologies. Swift is a powerful and intuitive programming language primarily used for iOS development. On the other hand, .NET is a versatile and robust framework created by Microsoft, widely utilized for building various types of applications, including web, desktop, and mobile.

Key Differences Between Swift and .NET

  • Platform: Swift targets Apple's ecosystem, whereas .NET is cross-platform.
  • Language Paradigm: Swift is an open-source, strongly-typed language influenced by Objective-C. .NET uses languages like C# and VB.NET, which are also strongly-typed but have different syntax and API sets.
  • Runtime: Swift code runs on the LLVM compiler, while .NET operates on the Common Language Runtime (CLR).

Preparing for the Conversion

1. Set Up Your Development Environment

To begin converting Swift code to .NET, you will need to have both development environments set up:

  • Swift Development: Xcode, the IDE for developing Swift applications.
  • .NET Development: Visual Studio or Visual Studio Code along with the .NET SDK.

2. Identify Core Components

Start by analyzing the Swift codebase. Identify major components and libraries that need to be translated to .NET equivalents. A good rule of thumb is to break down the code into digestible parts like data models, business logic, and UI components.

Converting Data Models: Swift Structs and .NET Classes

In Swift, data structures are often defined using structs. In .NET, the equivalent is typically a class. See an example of converting a Swift struct to a .NET class:

Swift Struct Example

struct Person {
    var name: String
    var age: Int

.NET Class Equivalent

public class Person {
    public string Name { get; set; }
    public int Age { get; set; }


  • Property Syntax: Swift uses var to define properties, while .NET uses property definitions with public, get, and set.
  • Access Modifiers: In .NET, access modifiers like public are essential to define the scope of properties and methods.

Converting Logic: Swift Functions and .NET Methods

Swift functions are typically converted into methods within .NET classes. Pay attention to the syntax differences and the type system.

Swift Function Example

func greet(person: Person) -> String {
    return "Hello, \(person.name)"

.NET Method Equivalent

public string Greet(Person person) {
    return $"Hello, {person.Name}";


  • String Interpolation: Swift uses \() for string interpolation, whereas .NET uses the $ prefix.
  • Function Signature: The function signatures in .NET need to include a return type explicitly.

Handling Collections: Swift Arrays and .NET Lists

Swift Array Example

let numbers: [Int] = [1, 2, 3, 4, 5]

.NET List Equivalent

List<int> numbers = new List<int> { 1, 2, 3, 4, 5 };


  • Type Declaration: Swift declares array types using [], while .NET uses List<T> for dynamic collections.
  • Initialization: Both languages allow inline initialization of collection items.

Converting Asynchronous Code: Swift's async/await and .NET's async/await

Both Swift and .NET use the async/await paradigm for handling asynchronous tasks. The syntax is similar but has subtle differences.

Swift Asynchronous Function

func fetchData(completion: @escaping (Data?) -> Void) {
    // Asynchronous network call

.NET Asynchronous Method

public async Task<Data> FetchDataAsync() {
    // Asynchronous network call
    return null;


  • Completion Handlers vs. Tasks: Swift often uses completion handlers for asynchronous calls, whereas .NET uses Task objects.
  • Method Naming Conventions: It's a .NET convention to suffix asynchronous methods with Async.

Bridging the UI Components

Converting UI code can be more involved due to the different frameworks used by Swift (UIKit/SwiftUI) and .NET (WinForms/WPF/Xamarin). This often requires a complete redesign of the UI components.

Swift UI Example

var body: some View {
    Text("Hello, World!")

.NET (Xamarin) Equivalent

public class MyPage : ContentPage {
    public MyPage() {
        Content = new Label {
            Text = "Hello, World!",
            Padding = new Thickness(10)

Testing and Validation

Once the code has been fully translated, thorough testing is crucial. Utilize unit tests to ensure that your new .NET codebase functions identically to the original Swift application. This can be achieved using testing frameworks such as xUnit or NUnit in .NET.


Converting code from Swift to .NET is a multi-step process that involves understanding the syntactical and functional differences between the two languages. By systematically translating data models, business logic, asynchronous code, and UI components, you can effectively create a fully functional .NET application from an existing Swift codebase. Proper testing, a suite of development tools, and a profound understanding of both environments are crucial for a successful transition.

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Frequently Asked Questions

This free AI tool does its best to generate professional documentation. However, it's missing some context from other related files. The paid version takes into account different files to generate documentation for each use case, apart from the documentation of every file. You have also the possibility of add custom concepts to improve the knowledge of your codebase.

No. You don't have to enter any personal information to use Codex's free code documentation tool — it's 100% free.

No. An encrypted version of your code is stored only while its being processed and it's deleted immediately.

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