Add "Remarks" and "Example" headings for error references in range [C3381, C3420]

Author: Rageking8

docs/error-messages/compiler-errors-2/compiler-error-c3381.md

@@ -10,10 +10,10 @@ ms.assetid: d276c89f-8377-4cb6-a8d4-7770885f06c4
 
 > '*identifier*' : assembly access specifiers are only available in code compiled with a /clr option
 
-A type was declared or defined by using an access specifier, which is only permitted in code compiled by using **`/clr`**.
-
 ## Remarks
 
+A type was declared or defined by using an access specifier, which is only permitted in code compiled by using **`/clr`**.
+
 This error may result from a misplaced **`public`**, **`protected`**, or **`private`** keyword, or a missing colon (**`:`**) after an access specifier within a **`class`** or **`struct`**.
 
 In C++/CLI, native types can be visible outside an assembly, but you can only specify assembly access for native types in a **`/clr`** compilation. For more information, see [Type visibility](../../dotnet/how-to-define-and-consume-classes-and-structs-cpp-cli.md#BKMK_Type_visibility) and [`/clr` (Common Language Runtime Compilation)](../../build/reference/clr-common-language-runtime-compilation.md).

docs/error-messages/compiler-errors-2/compiler-error-c3382.md

@@ -10,6 +10,8 @@ ms.assetid: a7603abd-ac4e-4ae6-a02b-3bdc6d1908a6
 
 > 'sizeof' is not supported with /clr:safe
 
+## Remarks
+
 The output file of a **/clr:safe** compilation is a file that is verifiably type safe, and sizeof is not supported because the return value of the sizeof operator is size_t, whose size varies depending on the operating system.
 
 For more information, see,

docs/error-messages/compiler-errors-2/compiler-error-c3383.md

@@ -10,6 +10,8 @@ ms.assetid: ceb7f725-f417-4dc3-8496-0f413bb76687
 
 > 'operator new' is not supported with /clr:safe
 
+## Remarks
+
 The output file of a **/clr:safe** compilation is a file that is verifiably type safe, and pointers are not supported.
 
 For more information, see,

docs/error-messages/compiler-errors-2/compiler-error-c3384.md

@@ -10,6 +10,8 @@ ms.assetid: c9f92c6a-62a9-4333-b2b1-bc55c7f288b6
 
 > 'type_parameter' : the value constraint and the ref constraint are mutually exclusive
 
+## Remarks
+
 You cannot constrain a generic type to both **`value class`** and **`ref class`**.
 
 See [Constraints on Generic Type Parameters (C++/CLI)](../../extensions/constraints-on-generic-type-parameters-cpp-cli.md) for more information.

docs/error-messages/compiler-errors-2/compiler-error-c3385.md

@@ -10,8 +10,12 @@ ms.assetid: 5f1838c1-986e-47db-8dbc-e06976b83cf3
 
 > 'class::function' : a function that has a DllImport Custom attribute cannot return an instance of a class
 
+## Remarks
+
 A function defined as being in a .dll file specified with the `DllImport` attribute cannot return an instance of a class.
 
+## Example
+
 The following sample generates C3385:
 
 ```cpp

docs/error-messages/compiler-errors-2/compiler-error-c3386.md

@@ -10,8 +10,12 @@ ms.assetid: 93fa8c33-0f10-402b-8eec-b0a217a1f8dc
 
 > '*type-name*' : `__declspec(dllexport)`/`__declspec(dllimport)` cannot be applied to a managed or WinRT type
 
+## Remarks
+
 The [`dllimport`](../../cpp/dllexport-dllimport.md) and [`dllexport`](../../cpp/dllexport-dllimport.md) **`__declspec`** modifiers aren't valid on a managed or Windows Runtime type.
 
+## Example
+
 The following sample generates C3386 and shows how to fix it:
 
 ```cpp

docs/error-messages/compiler-errors-2/compiler-error-c3387.md

@@ -10,8 +10,12 @@ ms.assetid: c54d9925-ed14-4976-b8db-e8d4dc84e536
 
 > 'member' : __declspec(dllexport)/\__declspec(dllimport) cannot be applied to a member of a managed or WinRT type
 
+## Remarks
+
 The `dllimport` and [dllexport](../../cpp/dllexport-dllimport.md) **`__declspec`** modifiers are not valid on members of a managed or Windows Runtime type.
 
+## Example
+
 The following sample generates C3387 and shows how to fix it:
 
 ```cpp

docs/error-messages/compiler-errors-2/compiler-error-c3388.md

@@ -10,6 +10,8 @@ ms.assetid: 34336545-ed13-4d81-ab5f-f869799fe4c2
 
 > 'type' : not allowed as a constraint, assuming 'ref class' to continue parsing
 
+## Remarks
+
 A constraint was specified on a generic type, but the constraint was not specified correctly. See [Constraints on Generic Type Parameters (C++/CLI)](../../extensions/constraints-on-generic-type-parameters-cpp-cli.md) for more information.
 
 ## Example

docs/error-messages/compiler-errors-2/compiler-error-c3390.md

@@ -10,10 +10,10 @@ ms.assetid: 84800a87-c8e6-45aa-82ae-02f816dc8d97
 
 > '*type_arg*' : invalid type argument for generic parameter '*param*' of generic '*generic_type*', must be a reference type
 
-A generic type was instantiated incorrectly. Check the type definition.
-
 ## Remarks
 
+A generic type was instantiated incorrectly. Check the type definition.
+
 For more information, see [Generics](../../extensions/generics-cpp-component-extensions.md).
 
 ## Example

docs/error-messages/compiler-errors-2/compiler-error-c3391.md

@@ -10,6 +10,8 @@ ms.assetid: c32532b9-7db4-4ccd-84b9-479e5a1a19d1
 
 > 'type_arg' : invalid type argument for generic parameter 'param' of generic 'generic_type', must be a non-nullable value type
 
+## Remarks
+
 A generic type was instantiated incorrectly. Check the type definition. For more information, see <xref:System.Nullable> and [Generics](../../extensions/generics-cpp-component-extensions.md).
 
 ## Example