SharpDevelop (#develop) is a free IDE for C#, VB.NET, and Boo projects on Microsoft's .NET platform. It is open-source, and you can download both source code and executables.
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Mono (mono-project) is a software platform designed to allow developers to easily create cross-platform applications. Mono is an open-source implementation of Microsoft's .NET Framework based on the ECMA standards for C# and the Common Language Runtime.
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Visual Studio Express 2017 for Windows Desktop. Lets you take full advantage of Windows with XAML designers, a productive IDE, and a variety of programming languages including C#, Visual Basic, and C++. Choose between Windows Presentation Foundation (WPF), Windows Forms, and Win32, to target the Windows desktop with the right technology for your application and your skills.
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Visual Studio Community is a fully-featured, extensible, free IDE for creating modern applications for Android, iOS, and Windows, as well as web applications and cloud services. Write code in C#, Visual Basic, F#, C++, HTML, JavaScript, TypeScript, Python, and more.
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QuickSharp A minimalist IDE for Microsoft .NET QuickSharp is a streamlined integrated development environment for Microsoft's .NET platform. It provides a simple, uncluttered development approach that lets you get programming in an instant. QuickSharp may be downloaded free of charge from SourceForge.
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