Address issue in c2855 for 2779

Author: Colin Robertson

docs/error-messages/compiler-errors-2/compiler-error-c2855.md

@@ -1,13 +1,23 @@
 ---
 description: "Learn more about: Compiler Error C2855"
 title: "Compiler Error C2855"
-ms.date: "11/04/2016"
+ms.date: 02/16/2021
 f1_keywords: ["C2855"]
 helpviewer_keywords: ["C2855"]
-ms.assetid: bfcd2619-f1e4-4016-95ee-5bdabe26fbad
 ---
 # Compiler Error C2855
 
-command-line option 'option' inconsistent with precompiled header
+> command-line option '*option*' inconsistent with precompiled header
 
-The given command-line option differs from the option used to create the precompiled header. Regenerate the precompiled header with the given command-line option.
+This error occurs when a command-line option differs from the options used to create the precompiled header.
+
+## Remarks
+
+Error C2855 can occur when you make an incremental build after changing a compiler option. It can also happen if you set specific compiler options for individual source files.
+
+To resolve this error, regenerate the precompiled header by using the specified command-line option. To regenerate the precompiled header, build the associated source file. For example, projects created by a Visual Studio template usually create a source file named *`pch.cpp`* to generate the precompiled header. (In older versions of Visual Studio, this file is named *`stdafx.cpp`*.) In other projects, the source file to rebuild is the one built by using the [`/Yc` (Create precompiled header file)](../../build/reference/yc-create-precompiled-header-file.md) compiler option. We recommend you rebuild your entire project after making a change to the precompiled header.
+
+## See also
+
+[`/Y` (Precompiled headers)](../../build/reference/y-precompiled-headers.md)\
+[Precompiled header files](../../build/creating-precompiled-header-files.md)