diff --git a/.globalconfig b/.globalconfig
index 87b3774db1..f6683fcab6 100644
--- a/.globalconfig
+++ b/.globalconfig
@@ -24,7 +24,8 @@ dotnet_diagnostic.CA1008.severity = none
 dotnet_diagnostic.CA1010.severity = silent
 
 # CA1012: Abstract types should not have public constructors
-dotnet_diagnostic.CA1012.severity = none
+dotnet_diagnostic.CA1012.severity = warning
+dotnet_code_quality.ca1012.api_surface = all
 
 # CA1014: Mark assemblies with CLSCompliant
 dotnet_diagnostic.CA1014.severity = none
diff --git a/src/Microsoft.Management.Infrastructure.CimCmdlets/CimAsyncOperation.cs b/src/Microsoft.Management.Infrastructure.CimCmdlets/CimAsyncOperation.cs
index e59367df0b..b0ee500989 100644
--- a/src/Microsoft.Management.Infrastructure.CimCmdlets/CimAsyncOperation.cs
+++ b/src/Microsoft.Management.Infrastructure.CimCmdlets/CimAsyncOperation.cs
@@ -28,7 +28,7 @@ namespace Microsoft.Management.Infrastructure.CimCmdlets
         /// <summary>
         /// The constructor.
         /// </summary>
-        public CimAsyncOperation()
+        protected CimAsyncOperation()
         {
             this.moreActionEvent = new ManualResetEventSlim(false);
             this.actionQueue = new ConcurrentQueue<CimBaseAction>();
diff --git a/src/Microsoft.Management.Infrastructure.CimCmdlets/CimBaseAction.cs b/src/Microsoft.Management.Infrastructure.CimCmdlets/CimBaseAction.cs
index 256130f0d3..939f6c047a 100644
--- a/src/Microsoft.Management.Infrastructure.CimCmdlets/CimBaseAction.cs
+++ b/src/Microsoft.Management.Infrastructure.CimCmdlets/CimBaseAction.cs
@@ -19,7 +19,7 @@ namespace Microsoft.Management.Infrastructure.CimCmdlets
         /// <summary>
         /// Constructor method.
         /// </summary>
-        public CimBaseAction()
+        protected CimBaseAction()
         {
         }
 
diff --git a/src/Microsoft.Management.Infrastructure.CimCmdlets/CimResultObserver.cs b/src/Microsoft.Management.Infrastructure.CimCmdlets/CimResultObserver.cs
index ed0de7c368..19040bfa3e 100644
--- a/src/Microsoft.Management.Infrastructure.CimCmdlets/CimResultObserver.cs
+++ b/src/Microsoft.Management.Infrastructure.CimCmdlets/CimResultObserver.cs
@@ -69,7 +69,7 @@ namespace Microsoft.Management.Infrastructure.CimCmdlets
         /// <param name="session"></param>
         /// <param name="observable"></param>
         /// <param name="resultType"></param>
-        public AsyncResultEventArgsBase(
+        protected AsyncResultEventArgsBase(
             CimSession session,
             IObservable<object> observable,
             AsyncResultType resultType)
@@ -86,7 +86,7 @@ namespace Microsoft.Management.Infrastructure.CimCmdlets
         /// <param name="observable"></param>
         /// <param name="resultType"></param>
         /// <param name="context"></param>
-        public AsyncResultEventArgsBase(
+        protected AsyncResultEventArgsBase(
             CimSession session,
             IObservable<object> observable,
             AsyncResultType resultType,
diff --git a/src/System.Management.Automation/engine/debugger/debugger.cs b/src/System.Management.Automation/engine/debugger/debugger.cs
index d3e4a45879..331629f086 100644
--- a/src/System.Management.Automation/engine/debugger/debugger.cs
+++ b/src/System.Management.Automation/engine/debugger/debugger.cs
@@ -4198,7 +4198,7 @@ namespace System.Management.Automation
         /// <param name="runspace">Runspace.</param>
         /// <param name="runspaceType">Runspace type.</param>
         /// <param name="parentDebuggerId">Debugger Id of parent.</param>
-        public NestedRunspaceDebugger(
+        protected NestedRunspaceDebugger(
             Runspace runspace,
             PSMonitorRunspaceType runspaceType,
             Guid parentDebuggerId)
diff --git a/src/System.Management.Automation/engine/interpreter/ControlFlowInstructions.cs b/src/System.Management.Automation/engine/interpreter/ControlFlowInstructions.cs
index 6408a800b9..1b8ee9d93c 100644
--- a/src/System.Management.Automation/engine/interpreter/ControlFlowInstructions.cs
+++ b/src/System.Management.Automation/engine/interpreter/ControlFlowInstructions.cs
@@ -204,7 +204,7 @@ namespace System.Management.Automation.Interpreter
 
         internal readonly int _labelIndex;
 
-        public IndexedBranchInstruction(int labelIndex)
+        protected IndexedBranchInstruction(int labelIndex)
         {
             _labelIndex = labelIndex;
         }
diff --git a/src/System.Management.Automation/utils/ObjectReader.cs b/src/System.Management.Automation/utils/ObjectReader.cs
index 5b5e588f6e..ccbc176406 100644
--- a/src/System.Management.Automation/utils/ObjectReader.cs
+++ b/src/System.Management.Automation/utils/ObjectReader.cs
@@ -21,7 +21,7 @@ namespace System.Management.Automation.Internal
         /// </summary>
         /// <param name="stream">The stream to read.</param>
         /// <exception cref="ArgumentNullException">Thrown if the specified stream is null.</exception>
-        public ObjectReaderBase([In, Out] ObjectStreamBase stream)
+        protected ObjectReaderBase([In, Out] ObjectStreamBase stream)
         {
             if (stream == null)
             {