dotnet · dotnet-policy-service · Jun 24, 2025 · Jun 23, 2025 · Jun 23, 2025 · Jun 23, 2025
diff --git a/docs/azure/includes/dotnet-all.md b/docs/azure/includes/dotnet-all.md
diff --git a/docs/azure/includes/dotnet-new.md b/docs/azure/includes/dotnet-new.md
diff --git a/docs/core/compatibility/10.0.md b/docs/core/compatibility/10.0.md
@@ -78,6 +78,7 @@ If you're migrating an app to .NET 10, the breaking changes listed here might af
 | [MSBUILDCUSTOMBUILDEVENTWARNING escape hatch removed](sdk/10.0/custom-build-event-warning.md) | Behavioral change | Preview 1 |
 | [MSBuild custom culture resource handling](sdk/10.0/msbuild-custom-culture.md) | Behavioral change | Preview 1 |
 | [NU1510 is raised for direct references pruned by NuGet](sdk/10.0/nu1510-pruned-references.md) | Source incompatible | Preview 1 |
+| [PackageReference without a version raises an error](sdk/10.0/nu1015-packagereference-version.md) | Behavioral change | Preview 6 |
 | [HTTP warnings promoted to errors in `dotnet package list` and `dotnet package search`](sdk/10.0/http-warnings-to-errors.md) | Behavioral/source incompatible change | Preview 4 |
 
 ## Windows Forms

diff --git a/docs/core/compatibility/sdk/10.0/nu1015-packagereference-version.md b/docs/core/compatibility/sdk/10.0/nu1015-packagereference-version.md
@@ -0,0 +1,54 @@
+---
+title: "Breaking change - PackageReference without a version raises an error"
+description: "Learn about the breaking change in .NET 10 where PackageReference without a version raises NU1015 error instead of NU1604 warning."
+ms.date: 06/23/2025
+ai-usage: ai-assisted
+ms.custom: https://github.com/dotnet/docs/issues/46386
+---
+
+# PackageReference without a version will raise an error
+
+Starting in .NET 10, NuGet raises a [`NU1015` error](/nuget/reference/errors-and-warnings/nu1015) when a `PackageReference` item doesn't have a version specified, instead of the previous [`NU1604` warning](/nuget/reference/errors-and-warnings/nu1604).
+
+There's no change when using Central Package Management, since by design the PackageReference XML should not have a version in that scenario.
+
+## Version introduced
+
+.NET 10 Preview 6
+
+## Previous behavior
+
+Previously, NuGet raised a NU1604 warning with the following text:
+
+> Project dependency 'PackageA' does not contain an inclusive lower bound. Include a lower bound in the dependency version to ensure consistent restore results.
+
+## New behavior
+
+Starting in .NET 10, NuGet raises a NU1015 error with the following text:
+
+> The following PackageReference item(s) do not have a version specified: PackageA
+
+## Type of breaking change
+
+This is a [behavioral change](../../categories.md#behavioral-change).
+
+## Reason for change
+
+The "no lower bound" message was confusing, and it was unclear how to fix the issue. Additionally, NuGet restored the lowest version for that package, which is rarely what developers want. This change provides clearer and more actionable error messages when the version metadata is missing.
+
+## Recommended action
+
+Add a version to the package reference, for example:
+
+```diff
+- <PackageReference Include="Some.Package" />
++ <PackageReference Include="Some.Package" Version="1.2.3" />
+```
+
+If the lowest package version is desired, then use `Version="0.0.0"`. In this case, NuGet will raise warning NU1603, rather than the previous NU1604.
+
+To revert to the previous warning, you can set `SdkAnalysisLevel` to `9.0.300` or lower. However, this will affect all features that gate on `SdkAnalysisLevel`.
+
+## Affected APIs
+
+None.
diff --git a/docs/core/compatibility/toc.yml b/docs/core/compatibility/toc.yml
@@ -74,6 +74,8 @@ items:
                 href: sdk/10.0/msbuild-custom-culture.md
               - name: NU1510 is raised for direct references pruned by NuGet
                 href: sdk/10.0/nu1510-pruned-references.md
+              - name: PackageReference without a version raises error
+                href: sdk/10.0/nu1015-packagereference-version.md
               - name: HTTP warnings promoted to errors in package list and search
                 href: sdk/10.0/http-warnings-to-errors.md
           - name: Windows Forms
@@ -1984,6 +1986,8 @@ items:
                 href: sdk/10.0/msbuild-custom-culture.md
               - name: NU1510 is raised for direct references pruned by NuGet
                 href: sdk/10.0/nu1510-pruned-references.md
+              - name: PackageReference without a version raises error
+                href: sdk/10.0/nu1015-packagereference-version.md
               - name: HTTP warnings promoted to errors in package list and search
                 href: sdk/10.0/http-warnings-to-errors.md
           - name: .NET 9

diff --git a/docs/core/extensions/file-globbing.md b/docs/core/extensions/file-globbing.md
@@ -141,6 +141,37 @@ The preceding C# code:
 
 The additional `Match` overloads work in similar ways.
 
+### Ordered evaluation of include/exclude
+
+By default, the matcher evaluates **all** include patterns first, then applies **all** exclude patterns, regardless of the order in which you added them. This means you can't re-include files that were previously excluded.
+
+Starting in version 10 of the [📦 Microsoft.Extensions.FileSystemGlobbing package](https://www.nuget.org/packages/Microsoft.Extensions.FileSystemGlobbing), you can opt into *ordered* evaluation, where includes and excludes are processed exactly in the sequence they were added:
+
+```csharp
+using Microsoft.Extensions.FileSystemGlobbing;
+
+// Preserve the order of patterns when matching.
+Matcher matcher = new(preserveFilterOrder: true);
+
+matcher.AddInclude("**/*");                // include everything
+matcher.AddExclude("logs/**/*");           // exclude logs
+matcher.AddInclude("logs/important/**/*"); // re-include important logs
+
+var result = matcher.Execute(new DirectoryInfoWrapper(new DirectoryInfo(root)));
+foreach (var file in result.Files)
+{
+    Console.WriteLine(file.Path);
+}
+```
+
+In this mode, patterns are applied one after another:  
+
+- `**/*` adds all files.
+- `logs/**/*` filters out anything in `logs/`.
+- `logs/important/**/*` adds back only files under `logs/important/`.
+
+Existing code that uses the default constructor will continue to run with the original "all includes, then all excludes" behavior.
+
 ## Pattern formats
 
 The patterns that are specified in the `AddExclude` and `AddInclude` methods can use the following formats to match multiple files or directories.

diff --git a/docs/csharp/asynchronous-programming/index.md b/docs/csharp/asynchronous-programming/index.md
@@ -42,7 +42,7 @@ You can start by updating the code so the thread doesn't block while tasks are r
 
 :::code language="csharp" source="snippets/index/AsyncBreakfast-V2/Program.cs" ID="SnippetMain":::
 
-The code updates the original method bodies of `FryEggs`, `FryBacon`, and `ToastBread` to return `Task<Egg>`, `Task<Bacon>`, and `Task<Toast>` objects, respectively. The updated method names include the "Async" suffix: `FryEggsAsync`, `FryBaconAsync`, and `ToastBreadAsync`. The `Main` method returns the `Task` object, although it doesn't have a `return` expression, which is by design. For more information, see [Evaluation of a void-returning async function](/dotnet/csharp/language-reference/language-specification/classes#14153-evaluation-of-a-void-returning-async-function).
+The code updates the original method bodies of `FryEggs`, `FryBacon`, and `ToastBread` to return `Task<Egg>`, `Task<Bacon>`, and `Task<Toast>` objects, respectively. The updated method names include the "Async" suffix: `FryEggsAsync`, `FryBaconAsync`, and `ToastBreadAsync`. The `Main` method returns the `Task` object, although it doesn't have a `return` expression, which is by design. For more information, see [Evaluation of a void-returning async function](/dotnet/csharp/language-reference/language-specification/classes#15144-evaluation-of-a-void-returning-async-function).
 
 > [!NOTE]
 > The updated code doesn't yet take advantage of key features of asynchronous programming, which can result in shorter completion times. The code processes the tasks in roughly the same amount of time as the initial synchronous version. For the full method implementations, see the [final version of the code](#review-final-code) later in this article.

diff --git a/docs/csharp/misc/cs0060.md b/docs/csharp/misc/cs0060.md
@@ -2,36 +2,40 @@
 description: "Compiler Error CS0060"
 title: "Compiler Error CS0060"
 ms.date: 07/20/2015
-f1_keywords: 
+f1_keywords:
   - "CS0060"
-helpviewer_keywords: 
+helpviewer_keywords:
   - "CS0060"
 ms.assetid: ae6d4fb7-5ff9-4883-82c3-f55b190f439a
 ---
 # Compiler Error CS0060
 
-Inconsistent accessibility: base class 'class1' is less accessible than class 'class2'  
-
- Class accessibility should be consistent between the base class and inherited class.  
-
- The following sample generates CS0060:  
-
-```csharp  
-// CS0060.cs  
-class MyClass  
-// try the following line instead  
-// public class MyClass  
-{  
-}  
-
-public class MyClass2 : MyClass   // CS0060  
-{  
-   public static void Main()  
-   {  
-   }  
-}  
-```  
-
+Inconsistent accessibility: base class 'Class1' is less accessible than class 'Class2'
+
+In C#, a derived class cannot have broader accessibility than its base class. If the base class is less accessible, consumers of the derived class might unintentionally gain access to a class they shouldn't see.
+
+Subclasses can never be more accessible than their base classes. That would allow consumers of the subclass broader access to the base type than was intended.
+
+The following sample produces CS0060 because `Class1` is `internal` and `Class2` is `public`.
+
+```csharp
+internal class Class1
+{
+}
+
+public class Class2 : Class1 // 🛑 CS0060: Class1 is less accessible
+{
+}
+```
+
+You can resolve CS0060 in one of two ways:
+
+- Make the base class more accessible: Change `Class1` to be `public`.
+- Restrict the derived class's accessibility: Change `Class2` to be `internal`.
+
+> [!TIP]
+> Base classes can be _more_ accessible than their subclasses, but never _less_ accessible.
+
 ## See also
 
 - [Access Modifiers](../programming-guide/classes-and-structs/access-modifiers.md)
diff --git a/...mentals/runtime-libraries/snippets/System.Numerics/Complex/Overview/csharp/Project.csproj b/...mentals/runtime-libraries/snippets/System.Numerics/Complex/Overview/csharp/Project.csproj
@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFrameworks>net9</TargetFrameworks>
+    <TargetFramework>net9.0</TargetFramework>
   </PropertyGroup>
 
  </Project>
diff --git a/...amentals/runtime-libraries/snippets/System.Numerics/Complex/Overview/csharp/customfmt1.cs b/...amentals/runtime-libraries/snippets/System.Numerics/Complex/Overview/csharp/customfmt1.cs
@@ -33,9 +33,19 @@ public string Format(string format, object arg,
                 fmtString = "N" + precision.ToString();
             }
             if (format.Substring(0, 1).Equals("I", StringComparison.OrdinalIgnoreCase))
-                return c1.Real.ToString(fmtString) + " + " + c1.Imaginary.ToString(fmtString) + "i";
+            {
+                // Determine the sign to display.
+                char sign = c1.Imaginary < 0 ? '-' : '+';
+                // Display the determined sign and the absolute value of the imaginary part.
+                return c1.Real.ToString(fmtString) + " " + sign + " " + Math.Abs(c1.Imaginary).ToString(fmtString) + "i";
+            }
             else if (format.Substring(0, 1).Equals("J", StringComparison.OrdinalIgnoreCase))
-                return c1.Real.ToString(fmtString) + " + " + c1.Imaginary.ToString(fmtString) + "j";
+            {
+                // Determine the sign to display.
+                char sign = c1.Imaginary < 0 ? '-' : '+';
+                // Display the determined sign and the absolute value of the imaginary part.
+                return c1.Real.ToString(fmtString) + " " + sign + " " + Math.Abs(c1.Imaginary).ToString(fmtString) + "j";
+            }
             else
                 return c1.ToString(format, provider);
         }

diff --git a/...undamentals/runtime-libraries/snippets/System.Numerics/Complex/Overview/vb/Project.vbproj b/...undamentals/runtime-libraries/snippets/System.Numerics/Complex/Overview/vb/Project.vbproj
@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFrameworks>net9</TargetFrameworks>
+    <TargetFramework>net9.0</TargetFramework>
   </PropertyGroup>
 
  </Project>
diff --git a/...fundamentals/runtime-libraries/snippets/System.Numerics/Complex/Overview/vb/customfmt1.vb b/...fundamentals/runtime-libraries/snippets/System.Numerics/Complex/Overview/vb/customfmt1.vb
@@ -32,10 +32,13 @@ Public Class ComplexFormatter
                 End Try
                 fmtString = "N" + precision.ToString()
             End If
+            ' Determine the sign to display.
+            Dim sign As Char = If(c1.Imaginary < 0.0, "-"c, "+"c)
+            ' Display the determined sign and the absolute value of the imaginary part.
             If fmt.Substring(0, 1).Equals("I", StringComparison.OrdinalIgnoreCase) Then
-                Return c1.Real.ToString(fmtString) + " + " + c1.Imaginary.ToString(fmtString) + "i"
+                Return c1.Real.ToString(fmtString) + " " + sign + " " + Math.Abs(c1.Imaginary).ToString(fmtString) + "i"
             ElseIf fmt.Substring(0, 1).Equals("J", StringComparison.OrdinalIgnoreCase) Then
-                Return c1.Real.ToString(fmtString) + " + " + c1.Imaginary.ToString(fmtString) + "j"
+                Return c1.Real.ToString(fmtString) + " " + sign + " " + Math.Abs(c1.Imaginary).ToString(fmtString) + "j"
             Else
                 Return c1.ToString(fmt, provider)
             End If