I am often using Html controls to build UIs in Linqpad. I understand that when I don't use Util.KeepRunning(), breakpoints in the debugger won't be hit in things triggered by events, because the main thread has already ended at this point, and all subsequent event handlers are running in separate threads.

I did a quick experiment where I added:

void OnStart()
{
    if (Debugger.IsAttached)
        Util.KeepRunning();
}

and as long as I have the 'Break when exception is unhandled' box checked on my query, this does what I need.

I was thinking I'd just like that piece of code to be automatically included in all new scripts I create. I was talking to Claude Sonnet about this and it appears to have hallucinated that such a 'template script' feature exists in Advanced, but I don't see it... so, thanks Claude.

Curious if anyone else has these kinds of slight annoyances and if they have any suggestions for what I'm sort of trying to accomplish. Likely the best thing is to just add a snippet and remember to use it for UI scripts.

https://stackoverflow.com/questions/3555317/linqpad-extension-methods

Considering the leadership's direction with the site, I'm not confident the post (and site 😖) will be around for much longer.

Have you considered adding a wiki to have a more official "guide" and documentation?

I'm not volunteering myself to manage it, but I would definitely make some contributions. Info in posts like that wouldn't be lost and if there's enough interest, we can help keep it up to date.

However, LPRun doesn't seem to want to run:

(Yes, I've read the bundled Help! LINQPad won't start!.txt readme files; but despite the restrictions in the Azure App Service sandbox (rsfilter.sys, fyi), the full dotnet environment is ostensibly available, hence why I'm unsure of the exact cause of all these errors (below) about LPRunN.exe not finding any installed versions of dotnet.

LinqPad 5 LPRun.exe:

C:\home\site\Utility\LPRun\LPRun5>LPRun.exe
IOException: The handle is invalid.

   at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)
   at System.IO.__Error.WinIOError()
   at System.Console.set_InputEncoding(Encoding value)
   at LINQPad.Cmd.LPCmd.Run(String[] args)

C:\home\site\Utility\LPRun\LPRun5> 

LinqPad 6 LPRun6.exe:

C:\home\site\Utility\LPRun\LPRun6>lprun6.exe
You must install or update .NET to run this application.

App: C:\home\site\Utility\LPRun\LPRun6\LPRun6.exe
Architecture: x64

Framework: 'Microsoft.WindowsDesktop.App', version '3.1.0' (x64)
.NET location: C:\Program Files\dotnet

No frameworks were found.

Learn more:
https://aka.ms/dotnet/app-launch-failed

To install missing framework, download:
https://aka.ms/dotnet-core-applaunch?framework=Microsoft.WindowsDesktop.App&framework_version=3.1.0&arch=x64&rid=win-x64&os=win10
C:\home\site\Utility\LPRun\LPRun6> 

LinqPad 6 LPRun6-net5.exe:

C:\home\site\Utility\LPRun\LPRun6>LPRun6-net5.exe
You must install or update .NET to run this application.

App: C:\home\site\Utility\LPRun\LPRun6\LPRun6-net5.exe
Architecture: x64

Framework: 'Microsoft.WindowsDesktop.App', version '5.0.0' (x64)
.NET location: C:\Program Files\dotnet

No frameworks were found.

Learn more:
https://aka.ms/dotnet/app-launch-failed

To install missing framework, download:
https://aka.ms/dotnet-core-applaunch?framework=Microsoft.WindowsDesktop.App&framework_version=5.0.0&arch=x64&rid=win-x64&os=win10

LinqPad 8 LPRun8.exe and LinqPad 8 LPRun8-x86.exe:

(Same output for both)

C:\home\site\Utility\LPRun\LPRun8>LPRun8-x86.exe

Directory 'C:\Program Files (x86)\dotnet\shared\Microsoft.WindowsDesktop.App' does not exist.
LINQPad 8 requires .NET 9, .NET 8, .NET 7 or .NET 6 (Desktop) to run.
Run 'Download .NET.exe' to install.

LinqPad 9 LPRun9.exe and LinqPad 9 LPRun9-x86.exe:

(Same output for both)

C:\home\site\Utility\LPRun\LPRun9>lprun9
Directory 'C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App' does not exist.
LINQPad 9 requires .NET 10, .NET 9 or .NET 8 (Desktop) to start up.
Run 'Download .NET.exe' to install.

Wondering when LINQPad 9 will supports it?

LINQPad9 (Preminum Edition) v9.7.13(X64)
Tools | Settings | Web Proxy | Specify Manually
Address http://127.0.0.1
Port 7897

When using it, I found that all network requests were not going through the proxy; in other words, the web proxy I set was not working.

As you don't have LINQPad Premium Edition you can only search for NuGet packages that include LINQPad samples.

Action noop = () => {};

However, the formatter seems to want to add a space between the braces, making it:

Action noop = () => { };

I don't want the space there. I only allow spaces for control flow statements.

What makes it worse is that if I'm working elsewhere in the script and enter the empty braces, the entire document is formatted and adds the space to every other existing "NOOP" braces. Fortunately for me, I could undo that last format and keep my intended changes. But I might not even be aware of the change since it can occur anywhere in the document!

    public static Action Noop() => () => {};
    public static Action<T> Noop<T>() => (_) => {};
    public static Action<T1, T2> Noop<T1, T2>() => (_, _) => {};
    public static Action<T1, T2, T3> Noop<T1, T2, T3>() => (_, _, _) => {};
    public static Action<T1, T2, T3, T4> Noop<T1, T2, T3, T4>() => (_, _, _, _) => {};
    // ... up to T16

    public static void Noop() => { // add closing brace here and watch the above lines

Speaking of which, things get a little wonky when using multiple cursors. When I initially made this family of these NOOP actions above, I'd start with creating N lines and start typing out base case. Then manually modify each to do what I need. Entering the closing brace can do one of many things, I think depending on the number of cursors and the last action you did.

    public static Action Noop() => () => {
    public static Action Noop() => () => {
    // ...
    public static Action Noop() => () => {
    public static Action Noop() => () => {
    public static Action Noop() => () => {

    // multiple cursors above, adding the closing brace to all can either:
    // - format the second to last line
    // - format the last line
    // - remove the indentation of the last two lines, then formats the lines
    // - enters the brace as intended and doesn't format the lines... but formats the rest of the document...
    // - any combination of the above
    // - etc.

Note: this doesn't apply just to lambdas, but any empty block that has no whitespace.

Could this unwanted formatting behavior be removed?

I’m experiencing a frustrating issue in LINQPad 9.7.13 (ARM64) where the editor layout "shifts" or "jumps" horizontally while typing.

This happens because the Roslyn lightbulb icon (Quick Actions) toggles on and off in the left margin based on the current compilation state (specifically triggering on CS0246 - The type or namespace name could not be found). Every time the lightbulb appears or disappears, the margin width changes, causing the code text to jump back and forth.

Is there a way to:

1. Make the glyph margin/gutter a permanent width so it doesn't shift the text?

2. Or, a setting to disable the lightbulb icons entirely?

Thanks!

As shown in the screenshot above, class name suggestions do not appear. In fact, the same issue occurs in local variable names.

For comparison, IntelliSense works correctly in assignment statements.

Interestingly, within a return statement, IntelliSense still functions properly after a dot operator.

The sample code runs without errors, but when executing it on macOS, the Results window returns null, and no chart is displayed.

Could you please advise whether this is related to:
• a specific setting,
• a macOS limitation, or
• a LINQPad version / runtime compatibility issue?

For reference, my system environment is:

Any guidance would be appreciated.

Error Testing Custom EF Core Connection: Could not load file or assembly 'Microsoft.Extensions.Logging.Abstractions, Version=10.0.0.0, Culture=neutral, PublicKeyToken=adb9793829ddae60'. The system cannot find the file specified.

We are using the portable version of LINQPad 9 (v9.6.6 (X64)_, licensed as Premium Edition. LINQPad9-x64.exe copied and renamed to LPRun9.exe as per the !!info for xcopy deployments.txt file.

I mention the portable version because this might matter. We're in the process of getting approval to get LINQPad 9 in Software Center for download/install, but getting new software approvals is like moving a mountain. So we're trying the non-installed version at the moment.

Moving on...

The Microsoft.Extensions.Logging.Abstractions package is a transitive dependency of our projects/solution. When working through the "EF Core DbContext Connection" dialog, it is not listed in the NuGet packages that LINQPad auto-finds that it says it needs to download.

I started-from-scratch:
1. Closed LINQPad
2. Cleared any locally-retained NuGet packages by clicking the "Clear NuGet local resources" button in Visual Studio's options
3. Closed Visual Studio
4. Deleted all bin and obj files for each project in our solution (we have a "Web" project for MVC/WebAPI and we have a "Core" project for all of the business logic)
5. Deleted the packages folder (our solution is setup for central package management)
6. Cleared all globally-retained NuGet packages with dotnet nuget locals global-packages --clear; verified %USERPROFILE%/.nuget was empty
7. Launched Visual Studio, opened our solution and ran a "Rebuild Solution"
8. Opened our portable version of LINQPad -> Add Connection... -> Entity Framework Core (3.x -> 10.x)
9. Clicked "Browse" for the "Path to Custom Assembly" field and selected our "Core" project's DLL (where EF is defined/used); the "Confirm Package Download" dialog appears, in which Microsoft.Extensions.Logging.Abstractions is not listed
10. Click "Yes" to download missing packages; and once completed, confirmed that the %USERPROFILE%\.nuget\packages folder is created and filled with the same packages listed in the dialog; Microsoft.Extensions.Logging.Abstractions still missing
11. Back in the "EF Core DbContext Connections" dialog, our DbContext has been automatically found and we simply click "OK" on the dialog that informed us of this
12. We indeed have a (sole) constructor that accepts DbContextOptions, so this (the only selectable) option is selected
13. We select the Microsoft.EntityFrameworkCore.SqlServer provider and enter our connection string
14. After entering a friendly name for the connection, we test the connection... and we get the "could not load" message at the top of this post

Figuring LINQPad is complaining that the DLL can't be found in the global directory for NuGet packages, I figured I'd use LINQPad to force its existence:
1. I closed the connection-creation dialog and pressed F4 while in a script editor window
2. I clicked the "Add NuGet..." button
3. In the "Search online" field, I searched for Microsoft.Extensions.Logging.Abstractions and used the "Add to Script" dropdown to specify that v10.0.0 be added
4. I verified that the %USERPROFILE%\.nuget\packages\Microsoft.Extensions.Logging.Abstractions folder appeared with a fully-filled 10.0.0 folder inside
5. I performed steps 3 and 4 again for v10.0.5, since our projects are up-to-date with pulling in v10.0.5 of Microsoft's NuGet packages
6. I closed LINQPad, opened it again and tried again to add the connection using all the same steps above and I still get the "could not load" message again

Does anyone have any ideas on why this transitive dependency is not being found by LINQPad? It may not even be the only one as it could be that this is just the first one we're encountering as LINQPad tries to resolve needed DLLs.

If you use rename on the record primary constructor parameter name (which is also the member), the rename changes the first parameter to the this constructor initalizer as well, when that is actually the parameter to the constructor.

Could you please permanently delete all personal data associated with my account registered under the email address drbob665@gmail.com, in accordance with my right to erasure under Article 17 of the General Data Protection Regulation (GDPR)?

This includes account information, usage data, and any other personal data held by your forum.
I kindly ask you to confirm receipt of this request and to complete the deletion within 30 days.

Kind regards

Had these been related to Nuget packages I was referencing directly I could resolve them but I'm referencing DLLs from work projects to test and prototype and the vulnerable references come from these DLLs. We see the warnings in Visual Studio but are ignoring them for now as our architects decide how to resolve these. This isn't ideal but it is what it is. Resistance to upgrading some packages stems from licencing costs of upgrading certain packages requiring others to stay on versions supported by those. A mess but I'm not looking for a solution to that.

What I am looking for a solution for is the display of the warnings in LINQPad results where for every execution I get something like this.

I would love to have some way of disabling the display of these warnings for individual queries, or perhaps an additional parameter to Dump() like bool suppressVulnerabilityWarnings = false. Perhaps there is already some way to do this that I'm not aware of. If not I hope you might consider adding one.

In VS Code, clicking "Reveal in File Explorer" correctly opens the folder in Total Commander, as do similar features in other applications.
However, in LINQPad v9.5.10 (x64 Premium), the "Open 'My Scripts' Folder in Explorer" button opens both Total Commander and Explorer simultaneously.

LINQPad is a great tool, and I hope it can follow the system setting in this case.

I found that IntelliSense stops working after typing the 'readonly' keyword, as shown below:

Without 'readonly', IntelliSense works normally:

The same issue also occurs when using other keywords like 'string':

You can easily reproduced this issue in script mode (screenshots omitted).

My LINQPad version is v9.6.6 (Premium, X64).

However, it work well outside of the using directive context:

When editing "Script" or ".linq" file, IntelliSense works correctly after using directives:

A little script to illustrate

var list = Enumerable.Range(1, 2).Select(a => Enumerable.Range(1, 2)).ToList();

for (int depth = 0; depth <= 2; depth++)
{
    list.Dump($"Dump with depth={depth}", depth: depth);
    new DumpContainer(list, o => { o.MaxDepth = depth; }).Dump($"DumpContainer with MaxDepth={depth}");

    list.Dump($"Dump with CollapseTo={depth}", collapseTo: depth);
    new DumpContainer(list, o => { o.CollapseTo = depth; }).Dump($"DumpContainer with CollapseTo={depth}");  
    "".Dump();
}

produces

Util.JS.Run("throw 'error!'");

If an error occurred within results panel, typically what used to happen is the text of the error message is added to the end of the page in red. (can't get a screenshot from a previous beta)

The initial release version would show the typical exception box.

However now in the latest beta (v9.7.9), it's popping up the script error dialog.

DirectoryInfo by default would display a hyperlinq showing the path that opens explorer to that directory.
FileInfo by default would display a hyperlinq showing the path that opens that file. It will also show a hyperlinq that "explores to" the file as well as the file size.

The generalized form displays the path but I could be overridden to display any text.

With the custom text, it's hard to tell what it will do, or what path it was referring to. Ideally, I would like to add a tooltip to the link to display the path (or other message). Looking at the decompiled Hyperlinq code, it seems like rendering it is handled elsewhere so will be hard to hook into it.

Could more options be added to hyperlinqs to control other aspects of the control?

Being able to set the title attribute would be a great add to deal with this. But in general, having access to the HtmlElement that was rendered would be more useful (similar to normal Controls). Maybe update it so it uses the builtin LINQPad.Controls.Control as a base?

Longer version :

I seem to spend a lot of time scrolling up and down my results windows especially when I am trying to compare the output of different dumps.

My previous solution was to use several panels to display different information which allows me to switch between panels easily. This was originally using a modified version of the code from https://forum.linqpad.net/discussion/comment/2463.

With the latest beta this has become much easier.

But panels have a major flaw in that links do not work. So MaxDepth links can not be expanded and other links using Util.OnDemand do not work.
(CollapseTo can be used in place of MaxDepth, but this does not look as neat and also limits the amount of information that can be dumped)

With the latest beta, I was trying out the new TabControl and this displays in the normal Output section and hence links work correctly.

https://share.linqpad.net/p6ki437c.linq is a script to demonstrate using the panel and using the tabcontrol.

I have hacked the tabcontrol to hardcode the content height to be 420px so that it fits on my screen when the editor is shown, but obviously this is the wrong size if I hide the editor and may not look right if your screen size is different from mine. So I was wondering if there was a way to do this properly?

PS I have also set overflow-x to auto so that it looks better if the content is wider that the current screen (although the script does not demo that).

PPS I'm aware my hacked version has a weird visual glitch from bleed-through when scrolling down - see

at System.Windows.Forms.NativeWindow.WindowClass.RegisterClass()
at System.Windows.Forms.NativeWindow.WindowClass.Create(String className, WNDCLASS_STYLES classStyle)
at System.Windows.Forms.NativeWindow.CreateHandle(CreateParams cp)
at System.Windows.Forms.Control.CreateHandle()
at System.Windows.Forms.Application.ThreadContext.get_MarshallingControl()
at System.Windows.Forms.WindowsFormsSynchronizationContext..ctor()
at LINQPad.UI.RuntimeUIServices.CreateSynchronizationContext()
at LINQPad.Util.CreateSynchronizationContext(Boolean reportActivity)

Is there a way to get around that?

Ran this script to try to figure out why I was getting a PaymentRequired response using AI telling me I did not have enough credits for 64000 tokens.

The script worked but only after I changed the url from ip-api.com/json to www.ip-api.com/json.

I also changed this script to set the tokens to 64000 and it failed as expected, but did not display any error message or the reason why it failed.

Simple HTML controls - div and span

This script has the comment below (which contains an extra word).

// NB: You can CANNOT add or remove Children after the control has been dumped.