diff --git a/docs/core/compatibility/6.0.md b/docs/core/compatibility/6.0.md
index 8b148d78fc94d..0b9fa6c19f0fb 100644
--- a/docs/core/compatibility/6.0.md
+++ b/docs/core/compatibility/6.0.md
@@ -134,6 +134,7 @@ If you're migrating an app to .NET 6, the breaking changes listed here might aff
 | [MSBuild no longer supports calling GetType()](sdk/6.0/calling-gettype-property-functions.md) | | | RC 1 |
 | [OutputType not automatically set to WinExe](sdk/6.0/outputtype-not-set-automatically.md) | ✔️ | ❌ | RC 1 |
 | [Publish ReadyToRun with --no-restore requires changes](sdk/6.0/publish-readytorun-requires-restore-change.md) | ✔️ | ❌ | 6.0.100 |
+| [runtimeconfig.dev.json file not generated](sdk/6.0/runtimeconfigdev-file.md) | ❌ | ✔️ | 6.0.100 |
 | [RuntimeIdentifier warning if self-contained is unspecified](sdk/6.0/runtimeidentifier-self-contained.md) | ✔️ | ❌ | RC 1 |
 | [Version requirements for .NET 6 SDK](sdk/6.0/vs-msbuild-version.md) | ✔️ | ✔️ | 6.0.300 |
 | [Write reference assemblies to IntermediateOutputPath](sdk/6.0/write-reference-assemblies-to-obj.md) | ❌ | ✔️ | 6.0.200 |
diff --git a/docs/core/compatibility/sdk/6.0/runtimeconfigdev-file.md b/docs/core/compatibility/sdk/6.0/runtimeconfigdev-file.md
new file mode 100644
index 0000000000000..bd6ef93b01800
--- /dev/null
+++ b/docs/core/compatibility/sdk/6.0/runtimeconfigdev-file.md
@@ -0,0 +1,36 @@
+---
+title: "Breaking change: runtimeconfig.dev.json file not generated"
+description: Learn about the breaking change in the .NET 6 SDK where the runtimeconfig.dev.json file is no longer generated by default.
+ms.date: 05/04/2022
+---
+# runtimeconfig.dev.json file not generated
+
+The .NET SDK no longer generates the *runtimeconfig.dev.json* file by default. This file was not used in most scenarios, and finding and loading the file added small amounts of performance overhead.
+
+## Previous behavior
+
+An *\[Appname].runtimesettings.dev.json* file was automatically generated at compile time.
+
+## New behavior
+
+The *\[Appname].runtimesettings.dev.json* file is no longer generated by default.
+
+## Version introduced
+
+.NET SDK 6.0.100
+
+## Change category
+
+This change may affect [*binary compatibility*](../../categories.md#binary-compatibility).
+
+## Reason for change
+
+Not generating the file provides a small but measurable performance improvement.
+
+## Recommended action
+
+This change should not affect most customers. However, if you still require this file, add `<GenerateRuntimeConfigDevFile>true</GenerateRuntimeConfigDevFile>` to your project. For more information, see [GenerateRuntimeConfigDevFile](../../../project-sdk/msbuild-props.md#generateruntimeconfigdevfile).
+
+## Affected APIs
+
+N/A
diff --git a/docs/core/compatibility/toc.yml b/docs/core/compatibility/toc.yml
index 22fae38cca862..d47aecf4d2088 100644
--- a/docs/core/compatibility/toc.yml
+++ b/docs/core/compatibility/toc.yml
@@ -239,6 +239,8 @@ items:
           href: sdk/6.0/outputtype-not-set-automatically.md
         - name: Publish ReadyToRun with --no-restore requires changes
           href: sdk/6.0/publish-readytorun-requires-restore-change.md
+        - name: runtimeconfig.dev.json file not generated
+          href: sdk/6.0/runtimeconfigdev-file.md
         - name: RuntimeIdentifier warning if self-contained is unspecified
           href: sdk/6.0/runtimeidentifier-self-contained.md
         - name: Version requirements for .NET 6 SDK
@@ -985,6 +987,8 @@ items:
           href: sdk/6.0/outputtype-not-set-automatically.md
         - name: Publish ReadyToRun with --no-restore requires changes
           href: sdk/6.0/publish-readytorun-requires-restore-change.md
+        - name: runtimeconfig.dev.json file not generated
+          href: sdk/6.0/runtimeconfigdev-file.md
         - name: RuntimeIdentifier warning if self-contained is unspecified
           href: sdk/6.0/runtimeidentifier-self-contained.md
         - name: Version requirements for .NET 6 SDK
diff --git a/docs/core/project-sdk/msbuild-props.md b/docs/core/project-sdk/msbuild-props.md
index 2c45af4928e6d..8b728bf967011 100644
--- a/docs/core/project-sdk/msbuild-props.md
+++ b/docs/core/project-sdk/msbuild-props.md
@@ -148,6 +148,7 @@ The following MSBuild properties are documented in this section:
 - [CopyLocalLockFileAssemblies](#copylocallockfileassemblies)
 - [EnablePackageValidation](#enablepackagevalidation)
 - [ErrorOnDuplicatePublishOutputFiles](#erroronduplicatepublishoutputfiles)
+- [GenerateRuntimeConfigDevFile](#generateruntimeconfigdevfile)
 - [GenerateRuntimeConfigurationFiles](#generateruntimeconfigurationfiles)
 - [IsPublishable](#ispublishable)
 - [PreserveCompilationContext](#preservecompilationcontext)
@@ -221,6 +222,16 @@ The `EnablePackageValidation` property enables a series of validations on the pa
 
 This property was introduced in .NET 6.
 
+### GenerateRuntimeConfigDevFile
+
+Starting with the .NET 6 SDK, the *\[Appname].runtimesettings.dev.json* file is [no longer generated by default](../compatibility/sdk/6.0/runtimeconfigdev-file.md) at compile time. If you still want this file to be generated, set the `GenerateRuntimeConfigDevFile` property to `true`.
+
+```xml
+<PropertyGroup>
+  <GenerateRuntimeConfigDevFile>true</GenerateRuntimeConfigDevFile>
+</PropertyGroup>
+```
+
 ### GenerateRuntimeConfigurationFiles
 
 The `GenerateRuntimeConfigurationFiles` property controls whether runtime configuration options are copied from the *runtimeconfig.template.json* file to the *[appname].runtimeconfig.json* file. For apps that require a *runtimeconfig.json* file, that is, those whose `OutputType` is `Exe`, this property defaults to `true`.