5 ms·

CSharpRepl: C# REPL with syntax highlighting and intellisense

142 points by aragonite 2y ago

nick__m 2y ago
[flagged]
- ducdetronquito 2y ago
  [flagged]
waldrews 2y ago
How does it compare with LinqPad, polyglot notebooks, csi.exe?
- aragonite 2y ago
  The author has some comments on this on GitHub: https://github.com/waf/CSharpRepl?tab=readme-ov-file#comparison-with-other-repls https://github.com/waf/CSharpRepl?tab=readme-ov-file#compari... Even though it's not as feature-rich as linqpad's Dump() method, personally I find the ability to pretty print any object ("detailed view"[1]) by pressing ctrl+enter really convenient. E.g. try typing in new Uri("https://news.ycombinator.com") (without semicolon), then pressing ctrl+enter. [1] https://github.com/waf/CSharpRepl?tab=readme-ov-file#:~:text=will%20show%20a%20%22-,detailed%20view,-%22%20of%20the%20result https://github.com/waf/CSharpRepl?tab=readme-ov-file#:~:text...
ammo1662 2y ago
There is an alternative of LinqPad. It does not have a lot of features, but it is good enough for testing code snippets. https://github.com/roslynpad/roslynpad https://github.com/roslynpad/roslynpad
- xnorswap 2y ago
  When it comes to C# REPLs I absolutely adore LinqPad, although recently it's felt like I've had to buy licenses for it increasingly often which I've found annoying. If any other REPL can get to a point where it can rival LinqPad in functionality then it'll be an absolute winner. The key features linqpad has that I'd need from any replacement: * Securely store secrets Util.GetPassword prompts the user for the password if it's not in it's store. Leverages the windows user credential store. * Keeps the process running This is absolutely key, it keeps alive the process even after the script has finished, so you can easily attach a debugger / profiler to it when the script isn't running, then start the script again. It also means you can use AppDomain.CurrentDomain.SetData to cache expensive setup if you're trying to profile something. * Quickly switch between expression / statements / program mode It'll intelligently work out if you've written a single expression vs multi-line statements, and you can switch to "program" and it'll wrap what you've done so far in a Main stub. * Easily define default App.Config files, default namespaces, default nuget packages. After finally getting a fiddly setup working, there's a "Use as default for new queries" button which is very convenient. Also the "clone query" functionality is similarly useful for copying not just the C# text but all the background namespace declarations, references, config, etc. And that's about it. I barely use the database connection and exploration side, but I do use it daily for hooking into DLLs to quickly test changes to our internal projects.
  - stanac 2y ago
    RoslynPad support user input with `Console.ReadLine()`, but that's about it. For me personally it does everything I need for scripting C#. For anything more serous I usually create full program and a bat/sh file to execute it in a conveniently.
  - hnrodey 2y ago
    Great to see LINQPad getting some love. Wish it had a fully functional trial so outsiders can see the real thing before paying. Otherwise, the free version is crippled and boring. Made this video to show LINQPad and getting OAuth tokens from the Spotify api. https://www.youtube.com/watch?v=g2C1SXfTHXI&t=30s https://www.youtube.com/watch?v=g2C1SXfTHXI&t=30s
pjmlp 2y ago
Looks quite nice, specially since VSCode lacks interactive panes.
- jayd16 2y ago
  I think you can run C# in the debug console while debugging, at least.
- groone 2y ago
  VSCode has plugin for polyglot notebooks https://code.visualstudio.com/docs/languages/polyglot https://code.visualstudio.com/docs/languages/polyglot
classified 2y ago
Is it capable of UTF-8? I couldn't for the life of me get the F# REPL to read UTF-8.
- Pathogen-David 2y ago
  It doesn't change the output encoding by default, but if you manually set it to UTF8 it works. (IE: Console.OutputEncoding = System.Text.Encoding.UTF8;) That might be all you need to fix the F# REPL too.
- yau8edq12i 2y ago
  What do you mean? With dotnet fsi? I just tried it and it reads UTF8 just fine, at least in windows terminal.
- aragonite 2y ago
  If you mean problems having to do with assigning "..."u8 UTF-8 string literals to variables, there's this workaround: https://github.com/waf/CSharpRepl/issues/318#issuecomment-2128573403 https://github.com/waf/CSharpRepl/issues/318#issuecomment-21...
DeathArrow 2y ago
There's also LinqPad.
- novaleaf 2y ago
  NetPad for the OSS version. works great. https://github.com/tareqimbasher/NetPad https://github.com/tareqimbasher/NetPad
dgan 2y ago
Can't stop reading it as "shrapnel", especially with "intellisense" just below
spicyusername 2y ago
I just started learning C# while tinkering with Monogame. It's a really nice language to use, I'm quite surprised.
- pjc50 2y ago
  C# is an absolutely excellent language, and continues to gradually improve. Because I had to check this myself: Monogame is not tied to mono! It claims to support dotnet 8, so it looks suitably current and maintained. It is annoying that Microsoft had their own perfectly adequate game framework which they binned at one of the transitions https://en.wikipedia.org/wiki/Microsoft_XNA https://en.wikipedia.org/wiki/Microsoft_XNA
  - ClimaxGravely 2y ago
    monogame is pretty much the continuation of XNA although they have added more stuff. There is another framework called FNA that I've not used personally but I've heard it tries to match XNA exactly while monogame is a bit more forward looking. So FNA is good for porting forward your older XNA games.
- deleted 2y ago
  [deleted]
- utensil4778 2y ago
  C# was my first language so I am biased, but it continues to be my favorite language out of any I've tried.
  - doodpants 2y ago
    As someone who first learned to program in the early 80's, C# is far from my first language. But it is my favorite as well!
- hoofedear 2y ago
  C# is really an awesome language, it’s come such a long way. I know it used to be a pain and not very cross-platform friendly, but nowadays it’s a dream. Shoutout to Rider as the best IDE for it lol
DeathArrow 2y ago
I used Basic, Pascal, C++, C, Javascript, Python, Java and C#. C# is my favorite language because is relatively easy to write something without having to write a lot and there's relatively little boiler plate and ceremony. On top of its imperative foundations there were added some functional capabilities that are integrated very well. What is als likeable is there are a ton of learning materials for those who are interested, a ton of libraries and frameworks and the community being helpful. Also, C# can be used in about every domain, web backend, web fronted, desktop, small utilities, games, mobile and even microcontrollers. What I dislike about C# is that every file is also an object and I rather like a less OOP approach. Also, there are features the community asked for years, like algebraic types and even though people working on the language implementation recognized their importance, they still didn't find their way in the language. My favorite update to C# would be if it doesn't force so much object oriented workflow. Even C++ lets you work in a procedural way. Another.NET language I like is F# but I didn't invest much time in it because I don't have where to use it for work.
- Akronymus 2y ago
  > Another.NET language I like is F# but I didn't invest much time in it because I don't have where to use it for work. F# mostly replaced bash/powershell for me.
  - fayten 2y ago
    I have been dabbling with F# for scripts as well. The F# REPL (FSI) and .fsx files make it really easy to hammer something out and share.

142 points by aragonite 2y ago

nick__m 2y ago

[flagged]

ducdetronquito 2y ago
[flagged]

waldrews 2y ago

How does it compare with LinqPad, polyglot notebooks, csi.exe?

aragonite 2y ago
The author has some comments on this on GitHub: https://github.com/waf/CSharpRepl?tab=readme-ov-file#comparison-with-other-repls https://github.com/waf/CSharpRepl?tab=readme-ov-file#compari... Even though it's not as feature-rich as linqpad's Dump() method, personally I find the ability to pretty print any object ("detailed view"[1]) by pressing ctrl+enter really convenient. E.g. try typing in new Uri("https://news.ycombinator.com") (without semicolon), then pressing ctrl+enter. [1] https://github.com/waf/CSharpRepl?tab=readme-ov-file#:~:text=will%20show%20a%20%22-,detailed%20view,-%22%20of%20the%20result https://github.com/waf/CSharpRepl?tab=readme-ov-file#:~:text...

ammo1662 2y ago

There is an alternative of LinqPad. It does not have a lot of features, but it is good enough for testing code snippets. https://github.com/roslynpad/roslynpad https://github.com/roslynpad/roslynpad

xnorswap 2y ago
When it comes to C# REPLs I absolutely adore LinqPad, although recently it's felt like I've had to buy licenses for it increasingly often which I've found annoying. If any other REPL can get to a point where it can rival LinqPad in functionality then it'll be an absolute winner. The key features linqpad has that I'd need from any replacement: * Securely store secrets Util.GetPassword prompts the user for the password if it's not in it's store. Leverages the windows user credential store. * Keeps the process running This is absolutely key, it keeps alive the process even after the script has finished, so you can easily attach a debugger / profiler to it when the script isn't running, then start the script again. It also means you can use AppDomain.CurrentDomain.SetData to cache expensive setup if you're trying to profile something. * Quickly switch between expression / statements / program mode It'll intelligently work out if you've written a single expression vs multi-line statements, and you can switch to "program" and it'll wrap what you've done so far in a Main stub. * Easily define default App.Config files, default namespaces, default nuget packages. After finally getting a fiddly setup working, there's a "Use as default for new queries" button which is very convenient. Also the "clone query" functionality is similarly useful for copying not just the C# text but all the background namespace declarations, references, config, etc. And that's about it. I barely use the database connection and exploration side, but I do use it daily for hooking into DLLs to quickly test changes to our internal projects.
- stanac 2y ago
  RoslynPad support user input with `Console.ReadLine()`, but that's about it. For me personally it does everything I need for scripting C#. For anything more serous I usually create full program and a bat/sh file to execute it in a conveniently.
- hnrodey 2y ago
  Great to see LINQPad getting some love. Wish it had a fully functional trial so outsiders can see the real thing before paying. Otherwise, the free version is crippled and boring. Made this video to show LINQPad and getting OAuth tokens from the Spotify api. https://www.youtube.com/watch?v=g2C1SXfTHXI&t=30s https://www.youtube.com/watch?v=g2C1SXfTHXI&t=30s

pjmlp 2y ago

Looks quite nice, specially since VSCode lacks interactive panes.

jayd16 2y ago
I think you can run C# in the debug console while debugging, at least.
groone 2y ago
VSCode has plugin for polyglot notebooks https://code.visualstudio.com/docs/languages/polyglot https://code.visualstudio.com/docs/languages/polyglot

classified 2y ago

Is it capable of UTF-8? I couldn't for the life of me get the F# REPL to read UTF-8.

Pathogen-David 2y ago
It doesn't change the output encoding by default, but if you manually set it to UTF8 it works. (IE: Console.OutputEncoding = System.Text.Encoding.UTF8;) That might be all you need to fix the F# REPL too.
yau8edq12i 2y ago
What do you mean? With dotnet fsi? I just tried it and it reads UTF8 just fine, at least in windows terminal.
aragonite 2y ago
If you mean problems having to do with assigning "..."u8 UTF-8 string literals to variables, there's this workaround: https://github.com/waf/CSharpRepl/issues/318#issuecomment-2128573403 https://github.com/waf/CSharpRepl/issues/318#issuecomment-21...

DeathArrow 2y ago

There's also LinqPad.

novaleaf 2y ago
NetPad for the OSS version. works great. https://github.com/tareqimbasher/NetPad https://github.com/tareqimbasher/NetPad

dgan 2y ago

Can't stop reading it as "shrapnel", especially with "intellisense" just below

spicyusername 2y ago

I just started learning C# while tinkering with Monogame. It's a really nice language to use, I'm quite surprised.

pjc50 2y ago
C# is an absolutely excellent language, and continues to gradually improve. Because I had to check this myself: Monogame is not tied to mono! It claims to support dotnet 8, so it looks suitably current and maintained. It is annoying that Microsoft had their own perfectly adequate game framework which they binned at one of the transitions https://en.wikipedia.org/wiki/Microsoft_XNA https://en.wikipedia.org/wiki/Microsoft_XNA
- ClimaxGravely 2y ago
  monogame is pretty much the continuation of XNA although they have added more stuff. There is another framework called FNA that I've not used personally but I've heard it tries to match XNA exactly while monogame is a bit more forward looking. So FNA is good for porting forward your older XNA games.
deleted 2y ago
[deleted]
utensil4778 2y ago
C# was my first language so I am biased, but it continues to be my favorite language out of any I've tried.
- doodpants 2y ago
  As someone who first learned to program in the early 80's, C# is far from my first language. But it is my favorite as well!
hoofedear 2y ago
C# is really an awesome language, it’s come such a long way. I know it used to be a pain and not very cross-platform friendly, but nowadays it’s a dream. Shoutout to Rider as the best IDE for it lol

DeathArrow 2y ago

I used Basic, Pascal, C++, C, Javascript, Python, Java and C#. C# is my favorite language because is relatively easy to write something without having to write a lot and there's relatively little boiler plate and ceremony. On top of its imperative foundations there were added some functional capabilities that are integrated very well. What is als likeable is there are a ton of learning materials for those who are interested, a ton of libraries and frameworks and the community being helpful. Also, C# can be used in about every domain, web backend, web fronted, desktop, small utilities, games, mobile and even microcontrollers. What I dislike about C# is that every file is also an object and I rather like a less OOP approach. Also, there are features the community asked for years, like algebraic types and even though people working on the language implementation recognized their importance, they still didn't find their way in the language. My favorite update to C# would be if it doesn't force so much object oriented workflow. Even C++ lets you work in a procedural way. Another.NET language I like is F# but I didn't invest much time in it because I don't have where to use it for work.

Akronymus 2y ago
> Another.NET language I like is F# but I didn't invest much time in it because I don't have where to use it for work. F# mostly replaced bash/powershell for me.
- fayten 2y ago
  I have been dabbling with F# for scripts as well. The F# REPL (FSI) and .fsx files make it really easy to hammer something out and share.