diff --git a/src/Microsoft.PackageManagement/providers/inbox/Common/Utility/PathUtility.cs b/src/Microsoft.PackageManagement/providers/inbox/Common/Utility/PathUtility.cs
index 6f4d357ca3..ad4ed28d59 100644
--- a/src/Microsoft.PackageManagement/providers/inbox/Common/Utility/PathUtility.cs
+++ b/src/Microsoft.PackageManagement/providers/inbox/Common/Utility/PathUtility.cs
@@ -192,7 +192,7 @@ namespace Microsoft.PackageManagement.Provider.Utility
 #if !CORECLR
                 Marshal.ZeroFreeGlobalAllocUnicode(value);
 #else
-                SecureStringMarshal.ZeroFreeCoTaskMemUnicode(value);
+                Marshal.ZeroFreeCoTaskMemUnicode(value);
 #endif
             }
         }
@@ -250,4 +250,4 @@ namespace Microsoft.PackageManagement.Provider.Utility
         }
 
     }
-}
\ No newline at end of file
+}
diff --git a/src/Microsoft.PowerShell.Commands.Management/cimSupport/cmdletization/cim/cimConverter.cs b/src/Microsoft.PowerShell.Commands.Management/cimSupport/cmdletization/cim/cimConverter.cs
index 41d28ddbb1..98f35b7041 100644
--- a/src/Microsoft.PowerShell.Commands.Management/cimSupport/cmdletization/cim/cimConverter.cs
+++ b/src/Microsoft.PowerShell.Commands.Management/cimSupport/cmdletization/cim/cimConverter.cs
@@ -96,7 +96,7 @@ namespace Microsoft.PowerShell.Cim
                 }
                 finally
                 {
-                    ClrFacade.ZeroFreeCoTaskMemUnicode(plainTextString);
+                    Marshal.ZeroFreeCoTaskMemUnicode(plainTextString);
                 }
             }
 
diff --git a/src/Microsoft.PowerShell.Commands.Management/commands/management/Process.cs b/src/Microsoft.PowerShell.Commands.Management/commands/management/Process.cs
index 6efe7c1180..073c1e5fe5 100644
--- a/src/Microsoft.PowerShell.Commands.Management/commands/management/Process.cs
+++ b/src/Microsoft.PowerShell.Commands.Management/commands/management/Process.cs
@@ -2574,7 +2574,7 @@ namespace Microsoft.PowerShell.Commands
                     {
                         if (password != IntPtr.Zero)
                         {
-                            ClrFacade.ZeroFreeCoTaskMemUnicode(password);
+                            Marshal.ZeroFreeCoTaskMemUnicode(password);
                         }
                     }
                 }//end of if
diff --git a/src/Microsoft.PowerShell.Commands.Management/commands/management/Service.cs b/src/Microsoft.PowerShell.Commands.Management/commands/management/Service.cs
index c155a5dad0..df78a5849c 100644
--- a/src/Microsoft.PowerShell.Commands.Management/commands/management/Service.cs
+++ b/src/Microsoft.PowerShell.Commands.Management/commands/management/Service.cs
@@ -2230,7 +2230,7 @@ namespace Microsoft.PowerShell.Commands
             {
                 if (IntPtr.Zero != password)
                 {
-                    ClrFacade.ZeroFreeCoTaskMemUnicode(password);
+                    Marshal.ZeroFreeCoTaskMemUnicode(password);
                 }
 
                 if (IntPtr.Zero != hService)
diff --git a/src/Microsoft.PowerShell.LocalAccounts/LocalAccounts/Extensions.cs b/src/Microsoft.PowerShell.LocalAccounts/LocalAccounts/Extensions.cs
index 2d43f187c8..fdc8c2c82f 100644
--- a/src/Microsoft.PowerShell.LocalAccounts/LocalAccounts/Extensions.cs
+++ b/src/Microsoft.PowerShell.LocalAccounts/LocalAccounts/Extensions.cs
@@ -160,7 +160,7 @@ namespace System.Management.Automation.SecurityAccountsManager.Extensions
 #if CORECLR
             IntPtr buffer = SecureStringMarshal.SecureStringToCoTaskMemUnicode(str);
             string clear = Marshal.PtrToStringUni(buffer);
-            SecureStringMarshal.ZeroFreeCoTaskMemUnicode(buffer);
+            Marshal.ZeroFreeCoTaskMemUnicode(buffer);
 #else
             var bstr = Marshal.SecureStringToBSTR(str);
             string clear = Marshal.PtrToStringAuto(bstr);
@@ -200,4 +200,4 @@ namespace System.Management.Automation.SecurityAccountsManager.Extensions
             return ex.MakeErrorRecord(ex.ErrorName, ex.ErrorCategory, target ?? ex.Target);
         }
     }
-}
\ No newline at end of file
+}
diff --git a/src/System.Management.Automation/engine/Credential.cs b/src/System.Management.Automation/engine/Credential.cs
index 3d15e1cd82..3a6b07a77a 100644
--- a/src/System.Management.Automation/engine/Credential.cs
+++ b/src/System.Management.Automation/engine/Credential.cs
@@ -9,6 +9,7 @@ using System.Net;
 using System.Security;
 using SafeString=System.String;
 using System.Runtime.Serialization;
+using System.Runtime.InteropServices;
 using System.Security.Cryptography;
 using Microsoft.PowerShell;
 
@@ -286,7 +287,7 @@ namespace System.Management.Automation
                     {
                         if (unmanagedPtr != IntPtr.Zero)
                         {
-                            ClrFacade.ZeroFreeCoTaskMemUnicode(unmanagedPtr);
+                            Marshal.ZeroFreeCoTaskMemUnicode(unmanagedPtr);
                         }
                     }
 #else
diff --git a/src/System.Management.Automation/engine/Utils.cs b/src/System.Management.Automation/engine/Utils.cs
index 8fb7d56631..d9fa665494 100644
--- a/src/System.Management.Automation/engine/Utils.cs
+++ b/src/System.Management.Automation/engine/Utils.cs
@@ -179,7 +179,7 @@ namespace System.Management.Automation
             {
                 if (p != IntPtr.Zero)
                 {
-                    ClrFacade.ZeroFreeCoTaskMemUnicode(p);
+                    Marshal.ZeroFreeCoTaskMemUnicode(p);
                 }
             }
 
diff --git a/src/System.Management.Automation/engine/remoting/fanin/WSManNativeAPI.cs b/src/System.Management.Automation/engine/remoting/fanin/WSManNativeAPI.cs
index a11eeb9b5a..0947e2d729 100644
--- a/src/System.Management.Automation/engine/remoting/fanin/WSManNativeAPI.cs
+++ b/src/System.Management.Automation/engine/remoting/fanin/WSManNativeAPI.cs
@@ -379,7 +379,7 @@ namespace System.Management.Automation.Remoting.Client
             {
                 if (cred.password != IntPtr.Zero)
                 {
-                    ClrFacade.ZeroFreeCoTaskMemUnicode(cred.password);
+                    Marshal.ZeroFreeCoTaskMemUnicode(cred.password);
                     cred.password = IntPtr.Zero;
                 }
 
diff --git a/src/System.Management.Automation/security/SecureStringHelper.cs b/src/System.Management.Automation/security/SecureStringHelper.cs
index 50948e91fb..89f777ce78 100644
--- a/src/System.Management.Automation/security/SecureStringHelper.cs
+++ b/src/System.Management.Automation/security/SecureStringHelper.cs
@@ -94,7 +94,7 @@ namespace Microsoft.PowerShell
                 }
                 finally
                 {
-                    ClrFacade.ZeroFreeCoTaskMemUnicode(ptr);
+                    Marshal.ZeroFreeCoTaskMemUnicode(ptr);
                 }
             }
 
diff --git a/src/System.Management.Automation/utils/ClrFacade.cs b/src/System.Management.Automation/utils/ClrFacade.cs
index 54f6424ac9..1f340b9ee5 100644
--- a/src/System.Management.Automation/utils/ClrFacade.cs
+++ b/src/System.Management.Automation/utils/ClrFacade.cs
@@ -148,7 +148,7 @@ namespace System.Management.Automation
             {
                 if (unmanagedMemory != IntPtr.Zero)
                 {
-                    ZeroFreeCoTaskMemUnicode(unmanagedMemory);
+                    Marshal.ZeroFreeCoTaskMemUnicode(unmanagedMemory);
                 }
             }
             return passwordInClearText;
@@ -213,19 +213,6 @@ namespace System.Management.Automation
 #endif
         }
 
-        /// <summary>
-        /// Needed to pair with the  SecureStringToCoTaskMemUnicode method which is member of 
-        /// 'SecureStringMarshal' on CORE CLR, and member of 'Marshal' on Full CLR.
-        /// </summary>
-        internal static void ZeroFreeCoTaskMemUnicode(IntPtr unmanagedStr)
-        {
-#if CORECLR
-            SecureStringMarshal.ZeroFreeCoTaskMemUnicode(unmanagedStr);
-#else
-            Marshal.ZeroFreeCoTaskMemUnicode(unmanagedStr);
-#endif
-        }
-
         /// <summary>
         /// Facade for SecureStringToCoTaskMemUnicode
         /// </summary>
diff --git a/src/System.Management.Automation/utils/CryptoUtils.cs b/src/System.Management.Automation/utils/CryptoUtils.cs
index 51fb8edf05..bc794d99b4 100644
--- a/src/System.Management.Automation/utils/CryptoUtils.cs
+++ b/src/System.Management.Automation/utils/CryptoUtils.cs
@@ -1023,7 +1023,7 @@ namespace System.Management.Automation.Internal
                     {
                         data[i] = Marshal.ReadByte(ptr, i);
                     }
-                    ClrFacade.ZeroFreeCoTaskMemUnicode(ptr);
+                    Marshal.ZeroFreeCoTaskMemUnicode(ptr);
 
                     try
                     {