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There are approximately 200 occurrences of LINQ usage in MSBuild's non-test and non-sample source code. While LINQ provides clean and expressive syntax, it is not considered high-performance, as noted…
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LINQ has many "fast path" casts to avoid O(n) when it sees the input is a known collection. It seems like there are many opportunities around such casts for JIT. Example:
```cs
object _obj = new MyC…
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# Nullable analysis of LINQ queries
* [x] Proposed
* [ ] Prototype: Not Started
* [ ] Implementation: Not Started
* [ ] Specification: Not Started
## Summary
[summary]: #summary
Nullable …
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### class with explicit interface implementation not working
I have a class Foo which implements an interface [explicit.](https://learn.microsoft.com/en-us/dotnet/csharp/programming-guide/interface…
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Since installing .NET 9, I have come across a bug in production where setting `preview` results in certain LINQ queries causing an `InvalidOperationException`. This did not happen with .NET 9 RC2, how…
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**Describe the bug**
The generated classes in the `DocumentFormat.OpenXml.Linq` namespace (e.g., `W`) are missing certain `XName` fields that were still present in previous versions of the SDK (e.g., …
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## Start from:
[Walkthrough: Creating an IQueryable LINQ Provider](https://msdn.microsoft.com/en-us/library/bb546158.aspx)
## Scope
It open question if this topic is in scope of the curse.
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### Description
hit crash on android with execute at https://github.com/dotnet/runtime/blob/d2a2a79b2eaf66d68a02f35917907bd9fbe97ea7/src/libraries/System.Linq.Expressions/src/System/Dynamic/Utils/Exp…
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[Job](https://mihubot.xyz/runtime-utils/Egpo-SfA) completed in 21 minutes 4 seconds.
https://github.com/dotnet/runtime/pull/109209
### Diffs
```
Found 274 files with textual diffs.
Summary of Code …
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With Marten 7.26.4, the following exception is raised :
` ---> Npgsql.PostgresException (0x80004005): 42601: syntax error on or close to « ) »` (translated from french error message)
The (simplified…