Fix outdated 17.15 to 18.0 (#80570)

jjonescz · web-flow · commit 522070553c97 · 2025-10-06T14:52:35.000+02:00
diff --git a/docs/compilers/CSharp/Compiler Breaking Changes - DotNet 10.md b/docs/compilers/CSharp/Compiler Breaking Changes - DotNet 10.md
@@ -361,7 +361,7 @@ class @extension
 }
 ```
 
-***Introduced in Visual Studio 2022 version 17.15.***
+***Introduced in Visual Studio 2026 version 18.0.***
 The "extension" identifier may not be used as a type name, so the following will not compile:
 ```csharp
 using extension = ...; // alias may not be named "extension"

Original file line number	Diff line number	Diff line change
`@@ -361,7 +361,7 @@ class @extension`
`361`	`361`	`}`
`362`	`362`	```
`363`	`363`
`364`		`-*Introduced in Visual Studio 2022 version 17.15.*`
	`364`	`+*Introduced in Visual Studio 2026 version 18.0.*`
`365`	`365`	`The "extension" identifier may not be used as a type name, so the following will not compile:`
`366`	`366`	```csharp
`367`	`367`	`using extension = ...; // alias may not be named "extension"`