MonoDevelop is an open source development environment designed for building applications on the .NET and Mono platforms. It provides a full-featured integrated development environment (IDE) with support for multiple languages, frameworks and technologies. It also provides a platform for developers to quickly and easily create applications for different platforms, including desktop, mobile, web and cloud. MonoDevelop supports development in C#, F#, Visual Basic, Vala and other languages. It also supports different frameworks such as ASP.NET, Xamarin and GTK#. It also includes a powerful debugging and refactoring engine, a flexible project system, and integration with the NuGet package manager. With MonoDevelop, developers can create and debug their applications with a single IDE, allowing them to focus more on the coding process.
Discontinued Visit kaxaml.com ... Does not seem to be actively maintained
Microsoft Visual Studio
SharpDevelop
Jetbrains Rider
Delphi
GNOME Builder
kodeWeave
Anjuta
RAD Studio
My Visual Database
CodeTyphon
Cevelop
LiveCode Platform
Ultimate++
Ecere SDK
BlueJ
Zinjai
Microsoft Small Basic
Pelles C
Kaxaml
Easy code
It's professional, has many other script editors for other languages like Java and C/C++, and it's great.