diff --git a/src/Microsoft.WSMan.Management/ConfigProvider.cs b/src/Microsoft.WSMan.Management/ConfigProvider.cs
index 326f53d4d94..65655fe5fe3 100644
--- a/src/Microsoft.WSMan.Management/ConfigProvider.cs
+++ b/src/Microsoft.WSMan.Management/ConfigProvider.cs
@@ -43,12 +43,12 @@ public sealed class WSManConfigProvider : NavigationCmdletProvider, ICmdletProvi
         /// <summary>
         /// Object contains the cache of the enumerate results for the cmdlet to execute.
         /// </summary>
-        private Dictionary<string, XmlDocument> enumerateMapping = new Dictionary<string, XmlDocument>();
+        private readonly Dictionary<string, XmlDocument> enumerateMapping = new Dictionary<string, XmlDocument>();
 
         /// <summary>
         /// Mapping of ResourceURI with the XML returned by the Get call.
         /// </summary>
-        private Dictionary<string, string> getMapping = new Dictionary<string, string>();
+        private readonly Dictionary<string, string> getMapping = new Dictionary<string, string>();
 
         #region ICmdletProviderSupportsHelp Members
 
diff --git a/src/Microsoft.WSMan.Management/CurrentConfigurations.cs b/src/Microsoft.WSMan.Management/CurrentConfigurations.cs
index 01ba71f68a7..783bfe1ef0b 100644
--- a/src/Microsoft.WSMan.Management/CurrentConfigurations.cs
+++ b/src/Microsoft.WSMan.Management/CurrentConfigurations.cs
@@ -21,7 +21,7 @@ internal class CurrentConfigurations
         /// <summary>
         /// This holds the current configurations XML.
         /// </summary>
-        private XmlDocument rootDocument;
+        private readonly XmlDocument rootDocument;
 
         /// <summary>
         /// Holds the reference to the current document element.
@@ -36,7 +36,7 @@ internal class CurrentConfigurations
         /// <summary>
         /// Session of the WsMan sserver.
         /// </summary>
-        private IWSManSession serverSession;
+        private readonly IWSManSession serverSession;
 
         /// <summary>
         /// Gets the server session associated with the configuration.
diff --git a/src/Microsoft.WSMan.Management/InvokeWSManAction.cs b/src/Microsoft.WSMan.Management/InvokeWSManAction.cs
index 1472a26f016..9420dd4a77f 100644
--- a/src/Microsoft.WSMan.Management/InvokeWSManAction.cs
+++ b/src/Microsoft.WSMan.Management/InvokeWSManAction.cs
@@ -244,7 +244,7 @@ public Uri ResourceURI
         private Uri resourceuri;
 
         private WSManHelper helper;
-        private IWSManEx m_wsmanObject = (IWSManEx)new WSManClass();
+        private readonly IWSManEx m_wsmanObject = (IWSManEx)new WSManClass();
         private IWSManSession m_session = null;
         private string connectionStr = string.Empty;
 
diff --git a/src/Microsoft.WSMan.Management/WSManInstance.cs b/src/Microsoft.WSMan.Management/WSManInstance.cs
index fa96cacf780..21ae0d1f0fe 100644
--- a/src/Microsoft.WSMan.Management/WSManInstance.cs
+++ b/src/Microsoft.WSMan.Management/WSManInstance.cs
@@ -1465,7 +1465,7 @@ public Hashtable ValueSet
         private Hashtable valueset;
 
         private WSManHelper helper;
-        private IWSManEx m_wsmanObject = (IWSManEx)new WSManClass();
+        private readonly IWSManEx m_wsmanObject = (IWSManEx)new WSManClass();
         private IWSManSession m_session = null;
         private string connectionStr = string.Empty;
 
diff --git a/src/Microsoft.WSMan.Management/WsManHelper.cs b/src/Microsoft.WSMan.Management/WsManHelper.cs
index f09ba2bb233..80010a0f5c3 100644
--- a/src/Microsoft.WSMan.Management/WsManHelper.cs
+++ b/src/Microsoft.WSMan.Management/WsManHelper.cs
@@ -78,13 +78,13 @@ internal class WSManHelper
         // string for operation
         internal string WSManOp = null;
 
-        private PSCmdlet cmdletname;
-        private NavigationCmdletProvider _provider;
+        private readonly PSCmdlet cmdletname;
+        private readonly NavigationCmdletProvider _provider;
 
         private FileStream _fs;
         private StreamReader _sr;
 
-        private static ResourceManager _resourceMgr = new ResourceManager("Microsoft.WSMan.Management.resources.WsManResources", typeof(WSManHelper).GetTypeInfo().Assembly);
+        private static readonly ResourceManager _resourceMgr = new ResourceManager("Microsoft.WSMan.Management.resources.WsManResources", typeof(WSManHelper).GetTypeInfo().Assembly);
 
         //
         //
@@ -1135,6 +1135,6 @@ internal static string GetResourceString(string Key)
 
         /// <summary>
         /// </summary>
-        private static Dictionary<string, string> ResourceValueCache = new Dictionary<string, string>();
+        private static readonly Dictionary<string, string> ResourceValueCache = new Dictionary<string, string>();
     }
 }