diff --git a/src/coreclr/System.Private.CoreLib/src/System/GC.CoreCLR.cs b/src/coreclr/System.Private.CoreLib/src/System/GC.CoreCLR.cs
index 89f59b0b9e2e3..b965a4c5792ea 100644
--- a/src/coreclr/System.Private.CoreLib/src/System/GC.CoreCLR.cs
+++ b/src/coreclr/System.Private.CoreLib/src/System/GC.CoreCLR.cs
@@ -19,11 +19,19 @@
 
 namespace System
 {
+    /// <summary>Specifies the behavior for a forced garbage collection.</summary>
     public enum GCCollectionMode
     {
+        /// <summary>The default setting for this enumeration, which is currently <see cref="GCCollectionMode.Forced" />.</summary>
         Default = 0,
+
+        /// <summary>Forces the garbage collection to occur immediately.</summary>
         Forced = 1,
+
+        /// <summary>Allows the garbage collector to determine whether the current time is optimal to reclaim objects.</summary>
         Optimized = 2,
+
+        /// <summary>Requests that the garbage collector decommit as much memory as possible.</summary>
         Aggressive = 3,
     }
 
diff --git a/src/libraries/System.Runtime/ref/System.Runtime.cs b/src/libraries/System.Runtime/ref/System.Runtime.cs
index 37b23579408a7..9b70d3f32134b 100644
--- a/src/libraries/System.Runtime/ref/System.Runtime.cs
+++ b/src/libraries/System.Runtime/ref/System.Runtime.cs
@@ -2608,19 +2608,11 @@ public static void WaitForPendingFinalizers() { }
         public static System.Collections.Generic.IReadOnlyDictionary<string, object> GetConfigurationVariables() { throw null; }
     }
 
-    /// <summary>Specifies the behavior for a forced garbage collection.</summary>
     public enum GCCollectionMode
     {
-        /// <summary>The default setting for this enumeration, which is currently <see cref="GCCollectionMode.Forced" />.</summary>
         Default = 0,
-
-        /// <summary>Forces the garbage collection to occur immediately.</summary>
         Forced = 1,
-
-        /// <summary>Allows the garbage collector to determine whether the current time is optimal to reclaim objects.</summary>
         Optimized = 2,
-
-        /// <summary>Requests that the garbage collector decommit as much memory as possible.</summary>
         Aggressive = 3,
     }