diff --git a/BaseTools/Source/Python/Workspace/DecBuildData.py b/BaseTools/Source/Python/Workspace/DecBuildData.py
index 7eeca95245..45beaebc63 100644
--- a/BaseTools/Source/Python/Workspace/DecBuildData.py
+++ b/BaseTools/Source/Python/Workspace/DecBuildData.py
@@ -116,21 +116,6 @@ class DecBuildData(PackageBuildClassObject):
     def _GetArch(self):
         return self._Arch
 
-    ## Set architecture
-    #
-    #   Changing the default ARCH to another may affect all other information
-    # because all information in a platform may be ARCH-related. That's
-    # why we need to clear all internal used members, in order to cause all
-    # information to be re-retrieved.
-    #
-    #   @param  Value   The value of ARCH
-    #
-    def _SetArch(self, Value):
-        if self._Arch == Value:
-            return
-        self._Arch = Value
-        self._Clear()
-
     ## Retrieve all information in [Defines] section
     #
     #   (Retriving all [Defines] information in one-shot is just to save time.)
@@ -469,7 +454,7 @@ class DecBuildData(PackageBuildClassObject):
 
 
     _Macros = property(_GetMacros)
-    Arch = property(_GetArch, _SetArch)
+    Arch = property(_GetArch)
     PackageName = property(_GetPackageName)
     Guid = property(_GetFileGuid)
     Version = property(_GetVersion)
diff --git a/BaseTools/Source/Python/Workspace/DscBuildData.py b/BaseTools/Source/Python/Workspace/DscBuildData.py
index c7f07f4646..a4ad53ee15 100644
--- a/BaseTools/Source/Python/Workspace/DscBuildData.py
+++ b/BaseTools/Source/Python/Workspace/DscBuildData.py
@@ -308,21 +308,6 @@ class DscBuildData(PlatformBuildClassObject):
     def _GetArch(self):
         return self._Arch
 
-    ## Set architecture
-    #
-    #   Changing the default ARCH to another may affect all other information
-    # because all information in a platform may be ARCH-related. That's
-    # why we need to clear all internal used members, in order to cause all
-    # information to be re-retrieved.
-    #
-    #   @param  Value   The value of ARCH
-    #
-    def _SetArch(self, Value):
-        if self._Arch == Value:
-            return
-        self._Arch = Value
-        self._Clear()
-
     ## Retrieve all information in [Defines] section
     #
     #   (Retriving all [Defines] information in one-shot is just to save time.)
@@ -2849,7 +2834,7 @@ class DscBuildData(PlatformBuildClassObject):
             self._DecPcds, self._GuidDict = GetDeclaredPcd(self, self._Bdb, self._Arch, self._Target, self._Toolchain, PkgSet)
         return self._DecPcds
     _Macros             = property(_GetMacros)
-    Arch                = property(_GetArch, _SetArch)
+    Arch                = property(_GetArch)
     Platform            = property(_GetPlatformName)
     PlatformName        = property(_GetPlatformName)
     Guid                = property(_GetFileGuid)
diff --git a/BaseTools/Source/Python/Workspace/InfBuildData.py b/BaseTools/Source/Python/Workspace/InfBuildData.py
index 44eaebf62e..7c3d712efe 100644
--- a/BaseTools/Source/Python/Workspace/InfBuildData.py
+++ b/BaseTools/Source/Python/Workspace/InfBuildData.py
@@ -173,36 +173,10 @@ class InfBuildData(ModuleBuildClassObject):
     def _GetArch(self):
         return self._Arch
 
-    ## Set architecture
-    #
-    #   Changing the default ARCH to another may affect all other information
-    # because all information in a platform may be ARCH-related. That's
-    # why we need to clear all internal used members, in order to cause all
-    # information to be re-retrieved.
-    #
-    #   @param  Value   The value of ARCH
-    #
-    def _SetArch(self, Value):
-        if self._Arch == Value:
-            return
-        self._Arch = Value
-        self._Clear()
-
     ## Return the name of platform employing this module
     def _GetPlatform(self):
         return self._Platform
 
-    ## Change the name of platform employing this module
-    #
-    #   Changing the default name of platform to another may affect some information
-    # because they may be PLATFORM-related. That's why we need to clear all internal
-    # used members, in order to cause all information to be re-retrieved.
-    #
-    def _SetPlatform(self, Value):
-        if self._Platform == Value:
-            return
-        self._Platform = Value
-        self._Clear()
     def _GetHeaderComments(self):
         if not self._HeaderComments:
             self._HeaderComments = []
@@ -1154,8 +1128,8 @@ class InfBuildData(ModuleBuildClassObject):
             return False
 
     _Macros = property(_GetMacros)
-    Arch = property(_GetArch, _SetArch)
-    Platform = property(_GetPlatform, _SetPlatform)
+    Arch = property(_GetArch)
+    Platform = property(_GetPlatform)
 
     HeaderComments = property(_GetHeaderComments)
     TailComments = property(_GetTailComments)