diff --git a/Documentation/specs/runtime-configuration-file.md b/Documentation/specs/runtime-configuration-file.md
index ff2df4c33..7d20b9726 100644
--- a/Documentation/specs/runtime-configuration-file.md
+++ b/Documentation/specs/runtime-configuration-file.md
@@ -25,8 +25,15 @@ The files are both JSON files stored in UTF-8 encoding. Below are sample files.
 ```json
 {
     "runtimeOptions": {
-        "gcServer": true,
-        "gcConcurrent": false,
+
+        "configProperties": {
+            "System.GC.Server": true,
+            "System.GC.Concurrent": true,
+            "System.Threading.ThreadPool.MinThreads": 4,
+            "System.Threading.ThreadPool.MaxThreads": 8,
+            "System.Threading.Thread.UseAllCpuGroups": true,
+        },
+
         "framework": {
             "name": "Microsoft.DotNetCore",
             "version": "1.0.1",
@@ -116,9 +123,11 @@ The files are both JSON files stored in UTF-8 encoding. Below are sample files.
 ### `runtimeOptions` Section (`.runtimeconfig.json`)
 
 This section is copied verbatim from an identical section in the input `project.json` file (with the exception of the `target` parameter which is generated by the compilation process). The `runtimeConfig` section specifies parameters to be provided to the runtime during initialization. Known parameters include:
-
-* `gcServer` - Boolean indicating if the server GC should be used (Default: _TBD_). Note: This is designed to mirror the existing [app.config](https://msdn.microsoft.com/en-us/library/ms229357.aspx) setting)
-* `gcConcurrent` - Boolean indicating if background garbage collection should be used (Default: _TBD_). Note: This is designed to mirror the existing [app.config](https://msdn.microsoft.com/en-us/library/yhwwzef8.aspx) setting).
+* `configProperties` - Indicates configuration properties to configure the runtime and the framework
+  * Examples:
+    * Full list of [configuration properties](https://github.com/dotnet/coreclr/blob/master/Documentation/project-docs/clr-configuration-knobs.md) for CoreCLR.
+    * `System.GC.Server` (old: `gcServer`) - Boolean indicating if the server GC should be used (Default: `true`).
+    * `System.GC.Concurrent` (old: `gcConcurrent`) - Boolean indicating if background garbage collection should be used.
 * `framework` - Indicates the `name`, `version`, and other properties of the shared framework to use when activating the application. The presence of this section indicates that the application is a portable app designed to use a shared redistributable framework.
   * `rollForward` - When `false`, the framework version is strictly obeyed by the host. When `rollForward` is unspecified or specified as `true`, the framework from either the same or a higher version that differs only in the `SemVer` patch field will be used.
     * For example, if `version=1.0.1` and `rollForward` is `true`, the host would load the shared framework from `1.0.{n}`, where `n >= 1`, but will not load from `1.1.0`, even if present. When `rollForward` is `false`, the shared framework will be loaded from `1.0.1` strictly.