[mdoc] Fixes an issue with member and type deletion.

Specifically, when updating classic and unified assemblies, members
that were completely removed from one or both assemblies were not
being removed from the XML. This patch updates mdoc's `DeleteMember`
method to properly handle deletion in all scenarios (normal, classic, unified).

Of course, deletion will still not happen if one of two things is true:

- `--delete` is *not* passed into the `mdoc update` call and the member node
  contains existing documentation.
- `--preserve` *is* passed into the `mdoc update` invocation.

In both of those cases, the member will not be deleted, and a message stating
as such will be written as a warning to the output.

9 files changed, 461 insertions, 26 deletions

diff --git a/mdoc/Makefile b/mdoc/Makefile
index a5bced66..4675d4a8 100644
--- a/mdoc/Makefile
+++ b/mdoc/Makefile
@@ -108,6 +108,22 @@ Test/DocTest-DropNS-classic.dll:
 Test/DocTest-DropNS-unified.dll:
 	$(CSCOMPILE) $(TEST_CSCFLAGS) -debug -unsafe -target:library -out:$@ Test/DocTest-DropNS-unified.cs
 
+Test/DocTest-DropNS-unified-deletetest.dll:
+	rm -f Test/DocTest-DropNS-unified-deletetest.dll
+	$(CSCOMPILE) $(TEST_CSCFLAGS) -debug -unsafe -target:library -out:$@ Test/DocTest-DropNS-unified.cs /define:DELETETEST
+
+Test/DocTest-DropNS-unified-deletetest-V2.dll:
+	rm -f Test/DocTest-DropNS-unified-deletetest.dll
+	$(CSCOMPILE) $(TEST_CSCFLAGS) -debug -unsafe -target:library -out:Test/DocTest-DropNS-unified-deletetest.dll Test/DocTest-DropNS-unified.cs /define:DELETETEST,V2
+
+Test/DocTest-DropNS-classic-deletetest.dll:
+	rm -f Test/DocTest-DropNS-classic-deletetest.dll
+	$(CSCOMPILE) $(TEST_CSCFLAGS) -debug -unsafe -target:library -out:$@ Test/DocTest-DropNS-classic.cs /define:DELETETEST
+
+Test/DocTest-DropNS-classic-deletetest-V2.dll:
+	rm -f Test/DocTest-DropNS-classic-deletetest.dll
+	$(CSCOMPILE) $(TEST_CSCFLAGS) -debug -unsafe -target:library -out:Test/DocTest-DropNS-classic-deletetest.dll Test/DocTest-DropNS-classic.cs /define:DELETETEST,V2
+
 Test/DocTest.dll: 
 	$(CSCOMPILE) $(TEST_CSCFLAGS) -debug -unsafe -target:library -out:$@ Test/DocTest.cs
 
@@ -151,6 +167,18 @@ check-monodocer-dropns-classic: $(PROGRAM)
 	$(MAKE) update-monodocer-dropns-unified
 	diff --exclude=.svn -rup Test/en.expected-dropns-classic-v1 Test/en.actual
 
+check-monodocer-dropns-delete: $(PROGRAM)
+	-rm -Rf Test/en.actual
+	$(MAKE) Test/DocTest-DropNS-classic-deletetest.dll
+	$(MONO) $(PROGRAM) update --delete --exceptions=all -o Test/en.actual Test/DocTest-DropNS-classic-deletetest.dll
+	$(MAKE) Test/DocTest-DropNS-unified-deletetest.dll
+	$(MONO) $(PROGRAM) update --delete --exceptions=all -o Test/en.actual Test/DocTest-DropNS-unified-deletetest.dll --dropns Test/DocTest-DropNS-unified-deletetest.dll=MyFramework
+	$(MAKE) Test/DocTest-DropNS-classic-deletetest-V2.dll
+	$(MONO) $(PROGRAM) update --delete --exceptions=all -o Test/en.actual Test/DocTest-DropNS-classic-deletetest.dll
+	$(MAKE) Test/DocTest-DropNS-unified-deletetest-V2.dll
+	$(MONO) $(PROGRAM) update --delete --exceptions=all -o Test/en.actual Test/DocTest-DropNS-unified-deletetest.dll --dropns Test/DocTest-DropNS-unified-deletetest.dll=MyFramework
+	diff --exclude=.dvn -rup Test/en.expected-dropns-delete Test/en.actual
+
 check-monodocer-dropns-classic-withsecondary: $(PROGRAM)
 	# tests case where a secondary assembly is included with a --dropns parameter
 	-rm -Rf Test/en.actual
@@ -343,6 +371,7 @@ check-doc-tools-update: check-monodocer-since-update \
 	check-monodocer-update \
 	check-monodocer-dropns-classic \
 	check-monodocer-dropns-classic-withsecondary \
+	check-monodocer-dropns-delete \
 	check-monodocer-internal-interface \
 	check-monodocer-enumerations \
 	check-monodocer-delete-update \
diff --git a/mdoc/Mono.Documentation/monodocer.cs b/mdoc/Mono.Documentation/monodocer.cs
index 81bcc850..50e7d3e2 100644
--- a/mdoc/Mono.Documentation/monodocer.cs
+++ b/mdoc/Mono.Documentation/monodocer.cs
@@ -187,6 +187,11 @@ class MDocUpdater : MDocCommand
 		return !string.IsNullOrWhiteSpace (droppedNamespace) && droppedAssemblies.Any(da => da == forModule.Name);
 	}
 
+	public static bool HasDroppedAnyNamespace ()
+	{
+		return !string.IsNullOrWhiteSpace (droppedNamespace);
+	}
+
 	
 	static List<string> droppedAssemblies = new List<string>();
 
@@ -1012,11 +1017,40 @@ class MDocUpdater : MDocCommand
 						continue;
 					}
 
-					if (string.IsNullOrWhiteSpace (PreserveTag)) { // only do this if there was no -preserve
+					Action actuallyDelete = () => {
 						string newname = typefile.FullName + ".remove";
-						try { System.IO.File.Delete(newname); } catch (Exception) { }
-						try { typefile.MoveTo(newname); } catch (Exception) { }
-						Console.WriteLine("Class no longer present; file renamed: " + Path.Combine(nsdir.Name, typefile.Name));
+						try { System.IO.File.Delete (newname); } catch (Exception ex) { Warning ("Unable to delete existing file: {0}", newname); }
+						try { typefile.MoveTo (newname); } catch (Exception ex) { Warning ("Unable to rename to: {0}", newname); }
+						Console.WriteLine ("Class no longer present; file renamed: " + Path.Combine (nsdir.Name, typefile.Name));
+					};
+
+					if (string.IsNullOrWhiteSpace (PreserveTag)) { // only do this if there was not a -preserve
+						using (TextWriter writer = OpenWrite (typefile.FullName, FileMode.Truncate))
+							WriteXml (doc.DocumentElement, writer);
+						
+						var unifiedAssemblyNode = doc.SelectSingleNode ("/Type/AssemblyInfo[@apistyle='unified']");
+						var classicAssemblyNode = doc.SelectSingleNode ("/Type/AssemblyInfo[@apistyle='classic']");
+						bool isUnifiedRun = HasDroppedAnyNamespace ();
+						bool isClassicOrNormalRun = !isUnifiedRun;
+						if (isClassicOrNormalRun) {
+							if (unifiedAssemblyNode != null) {
+								Warning ("*** this type is marked as unified, not deleting during this run: {0}", typefile.FullName);
+								// if truly removed from both assemblies, it will be removed fully during the unified run
+								continue;
+							} else {
+								// we should be safe to delete here because it was not marked as a unified assembly
+								actuallyDelete ();
+							}
+						}
+						if (isUnifiedRun) {
+							if (classicAssemblyNode != null) {
+								Warning ("*** this type is marked as classic, not deleting {0}", typefile.FullName);
+								continue; 
+							} else {
+								// safe to delete because it wasn't marked as a classic assembly, so the type is gone in both.
+								actuallyDelete ();
+							}
+						}
 					}
 				}
 			}
@@ -1291,34 +1325,51 @@ class MDocUpdater : MDocCommand
 		string format = output != null
 			? "{0}: File='{1}'; Signature='{4}'"
 			: "{0}: XPath='/Type[@FullName=\"{2}\"]/Members/Member[@MemberName=\"{3}\"]'; Signature='{4}'";
+		string signature = member.SelectSingleNode ("MemberSignature[@Language='C#']/@Value").Value;
 		Warning (format,
 				reason, 
 				output,
 				member.OwnerDocument.DocumentElement.GetAttribute ("FullName"),
 				member.Attributes ["MemberName"].Value, 
-				member.SelectSingleNode ("MemberSignature[@Language='C#']/@Value").Value);
-			if (!delete && MemberDocsHaveUserContent (member)) {
-				Warning ("Member deletions must be enabled with the --delete option.");
-			} else if (HasDroppedNamespace (type)) {
-				// if we're dropping the namespace, add the "classic style"
-				var existingAttribute = member.Attributes ["apistyle"];
-				if (existingAttribute != null) {
-					existingAttribute.Value = "classic";
-				} else {
-					// add the attribute and do not remove
-					XmlAttribute apistyleAttr = member.OwnerDocument.CreateAttribute ("apistyle");
+				signature);
 
-					apistyleAttr.Value = "classic";
+		// Identify all of the different states that could affect our decision to delete the member
+		bool shouldPreserve = !string.IsNullOrWhiteSpace (PreserveTag);
+		bool hasContent = MemberDocsHaveUserContent (member);
+		bool shouldDelete = !shouldPreserve && (delete || !hasContent);
 
-					member.Attributes.Append (apistyleAttr);
-				}
-			} else if (!HasDroppedNamespace (type) && member.Attributes ["apistyle"] != null && member.Attributes ["apistyle"].Value == "unified") {
-				// do nothing if there's an apistyle=new attribute and we haven't dropped the namespace
-			} else if (!string.IsNullOrWhiteSpace (PreserveTag)) {
-				// do nothing
-			} else {
+		bool unifiedRun = HasDroppedNamespace (type);
+
+		var classicAssemblyInfo = member.SelectSingleNode ("AssemblyInfo[@apistyle='classic']");
+		bool nodeIsClassic = classicAssemblyInfo != null;
+
+		Action actuallyDelete = () => {
 			todelete.Add (member);
 			deletions++;
+		};
+
+		if (!shouldDelete) {
+			// explicitly not deleting
+			string message = shouldPreserve ? 
+					"Not deleting '{0}' due to --preserve." :
+					"Not deleting '{0}'; must be enabled with the --delete option";
+			Warning (message, signature);
+		} else if (unifiedRun && nodeIsClassic) {
+			// this is a unified run, and the member doesn't exist, but is marked as being in the classic assembly.
+				Warning ("Not removing '{0}' since it's still in the classic assembly.", signature);
+		} else if (unifiedRun && !nodeIsClassic) {
+			// unified run, and the node is not classic, which means it doesn't exist anywhere.
+			actuallyDelete ();
+		} else {
+			if (!nodeIsClassic) {
+				actuallyDelete ();
+			} else {
+				Warning ("Removing classic from '{0}' ... will be removed in the unified run if not present there.", signature);
+				member.RemoveApiStyle (ApiStyle.Classic);
+				if (classicAssemblyInfo != null) {
+					member.RemoveChild (classicAssemblyInfo);
+				}
+			}
 		}
 	}
 
@@ -2882,21 +2933,32 @@ enum ApiStyle {
 static class DocUtils {
 
 	public static bool DoesNotHaveApiStyle(this XmlElement element, ApiStyle style) {
-		string styleString = style.ToString ().ToLower ();
+		string styleString = style.ToString ().ToLowerInvariant ();
 			string apistylevalue = element.GetAttribute ("apistyle");
 			return apistylevalue != styleString || string.IsNullOrWhiteSpace(apistylevalue);
 	}
 	public static bool HasApiStyle(this XmlElement element, ApiStyle style) {
-		string styleString = style.ToString ().ToLower ();
+		string styleString = style.ToString ().ToLowerInvariant ();
 		return element.GetAttribute ("apistyle") == styleString;
 	}
 	public static void AddApiStyle(this XmlElement element, ApiStyle style) {
-		string styleString = style.ToString ().ToLower ();
+		string styleString = style.ToString ().ToLowerInvariant ();
 		var existingValue = element.GetAttribute ("apistyle");
 		if (string.IsNullOrWhiteSpace (existingValue) || existingValue != styleString) {
 			element.SetAttribute ("apistyle", styleString);
 		}
 	}
+	public static void RemoveApiStyle (this XmlElement element, ApiStyle style) 
+	{
+		element.RemoveAttribute (style.ToString ().ToLowerInvariant ());
+	}
+	public static void RemoveApiStyle (this XmlNode node, ApiStyle style) 
+	{
+		var styleAttribute = node.Attributes ["apistyle"];
+		if (styleAttribute != null) {
+			node.Attributes.Remove (styleAttribute);
+		}
+	}
 
 	public static bool IsExplicitlyImplemented (MethodDefinition method)
 	{
diff --git a/mdoc/Test/DocTest-DropNS-classic.cs b/mdoc/Test/DocTest-DropNS-classic.cs
index a279b0e8..8346834b 100644
--- a/mdoc/Test/DocTest-DropNS-classic.cs
+++ b/mdoc/Test/DocTest-DropNS-classic.cs
@@ -4,5 +4,25 @@ namespace MyFramework.MyNamespace {
 		public float Hello(int value) {
 			return 0.0f;
 		}
+		#if DELETETEST
+		public string InBoth {get;set;}
+		public string InBothClassic {get;set;}
+		public int InBothMagicType {get;set;}
+		#endif
+
+		#if DELETETEST && V2
+		public string AddedInV2 {get;set;}
+		public string AddedInV2Classic {get;set;}
+		#endif
+		#if DELETETEST && !V2
+		public string WillDeleteInV2 {get;set;}
+		public string WillDeleteInV2Classic {get;set;}
+		#endif
 	}
+
+	#if DELETETEST && !V2
+	public class WillDelete {
+		public string Name {get;set;}
+	}
+	#endif
 }
diff --git a/mdoc/Test/DocTest-DropNS-unified.cs b/mdoc/Test/DocTest-DropNS-unified.cs
index 8ee5e8a6..9b0c364a 100644
--- a/mdoc/Test/DocTest-DropNS-unified.cs
+++ b/mdoc/Test/DocTest-DropNS-unified.cs
@@ -4,5 +4,30 @@ namespace MyNamespace {
 		public float Hello(int value) {
 			return 0.0f;
 		}
+		#if DELETETEST
+		public string InBoth {get;set;}
+		public string InBothUnified {get;set;}
+		public nint InBothMagicType {get;set;}
+		#endif
+
+		#if DELETETEST && V2
+		public string AddedInV2 {get;set;}
+		public string AddedInV2Unified {get;set;}
+		#endif
+		#if DELETETEST && !V2
+		public string WillDeleteInV2 {get;set;}
+		public string WillDeleteInV2Unified {get;set;}
+		#endif
 	}
+
+	#if DELETETEST
+	public struct nint {
+
+	}
+	#endif
+	#if DELETETEST && !V2
+	public class WillDelete {
+		public string Name {get;set;}
+	}
+	#endif
 }
diff --git a/mdoc/Test/en.expected-dropns-delete/MyFramework.MyNamespace/MyClass.xml b/mdoc/Test/en.expected-dropns-delete/MyFramework.MyNamespace/MyClass.xml
new file mode 100644
index 00000000..cb620b81
--- /dev/null
+++ b/mdoc/Test/en.expected-dropns-delete/MyFramework.MyNamespace/MyClass.xml
@@ -0,0 +1,204 @@
+<Type Name="MyClass" FullName="MyFramework.MyNamespace.MyClass">
+  <TypeSignature Language="C#" Value="public class MyClass" />
+  <TypeSignature Language="ILAsm" Value=".class public auto ansi beforefieldinit MyClass extends System.Object" />
+  <AssemblyInfo apistyle="classic">
+    <AssemblyName>DocTest-DropNS-classic-deletetest</AssemblyName>
+    <AssemblyVersion>0.0.0.0</AssemblyVersion>
+  </AssemblyInfo>
+  <AssemblyInfo apistyle="unified">
+    <AssemblyName>DocTest-DropNS-unified-deletetest</AssemblyName>
+    <AssemblyVersion>0.0.0.0</AssemblyVersion>
+  </AssemblyInfo>
+  <Base>
+    <BaseTypeName>System.Object</BaseTypeName>
+  </Base>
+  <Interfaces />
+  <Docs>
+    <summary>To be added.</summary>
+    <remarks>To be added.</remarks>
+  </Docs>
+  <Members>
+    <Member MemberName=".ctor">
+      <MemberSignature Language="C#" Value="public MyClass ();" />
+      <MemberSignature Language="ILAsm" Value=".method public hidebysig specialname rtspecialname instance void .ctor() cil managed" />
+      <MemberType>Constructor</MemberType>
+      <AssemblyInfo apistyle="classic">
+        <AssemblyVersion>0.0.0.0</AssemblyVersion>
+      </AssemblyInfo>
+      <AssemblyInfo apistyle="unified">
+        <AssemblyVersion>0.0.0.0</AssemblyVersion>
+      </AssemblyInfo>
+      <Parameters />
+      <Docs>
+        <summary>To be added.</summary>
+        <remarks>To be added.</remarks>
+      </Docs>
+    </Member>
+    <Member MemberName="AddedInV2">
+      <MemberSignature Language="C#" Value="public string AddedInV2 { get; set; }" />
+      <MemberSignature Language="ILAsm" Value=".property instance string AddedInV2" />
+      <MemberType>Property</MemberType>
+      <AssemblyInfo apistyle="classic">
+        <AssemblyVersion>0.0.0.0</AssemblyVersion>
+      </AssemblyInfo>
+      <AssemblyInfo apistyle="unified">
+        <AssemblyVersion>0.0.0.0</AssemblyVersion>
+      </AssemblyInfo>
+      <ReturnValue>
+        <ReturnType>System.String</ReturnType>
+      </ReturnValue>
+      <Docs>
+        <summary>To be added.</summary>
+        <value>To be added.</value>
+        <remarks>To be added.</remarks>
+      </Docs>
+    </Member>
+    <Member MemberName="AddedInV2Classic">
+      <MemberSignature Language="C#" Value="public string AddedInV2Classic { get; set; }" />
+      <MemberSignature Language="ILAsm" Value=".property instance string AddedInV2Classic" />
+      <MemberType>Property</MemberType>
+      <AssemblyInfo apistyle="classic">
+        <AssemblyVersion>0.0.0.0</AssemblyVersion>
+      </AssemblyInfo>
+      <ReturnValue>
+        <ReturnType>System.String</ReturnType>
+      </ReturnValue>
+      <Docs>
+        <summary>To be added.</summary>
+        <value>To be added.</value>
+        <remarks>To be added.</remarks>
+      </Docs>
+    </Member>
+    <Member MemberName="AddedInV2Unified">
+      <MemberSignature Language="C#" Value="public string AddedInV2Unified { get; set; }" />
+      <MemberSignature Language="ILAsm" Value=".property instance string AddedInV2Unified" />
+      <MemberType>Property</MemberType>
+      <AssemblyInfo apistyle="unified">
+        <AssemblyVersion>0.0.0.0</AssemblyVersion>
+      </AssemblyInfo>
+      <ReturnValue>
+        <ReturnType>System.String</ReturnType>
+      </ReturnValue>
+      <Docs>
+        <summary>To be added.</summary>
+        <value>To be added.</value>
+        <remarks>To be added.</remarks>
+      </Docs>
+    </Member>
+    <Member MemberName="Hello">
+      <MemberSignature Language="C#" Value="public float Hello (int value);" />
+      <MemberSignature Language="ILAsm" Value=".method public hidebysig instance float32 Hello(int32 value) cil managed" />
+      <MemberType>Method</MemberType>
+      <AssemblyInfo apistyle="classic">
+        <AssemblyVersion>0.0.0.0</AssemblyVersion>
+      </AssemblyInfo>
+      <AssemblyInfo apistyle="unified">
+        <AssemblyVersion>0.0.0.0</AssemblyVersion>
+      </AssemblyInfo>
+      <ReturnValue>
+        <ReturnType>System.Single</ReturnType>
+      </ReturnValue>
+      <Parameters>
+        <Parameter Name="value" Type="System.Int32" />
+      </Parameters>
+      <Docs>
+        <param name="value">To be added.</param>
+        <summary>To be added.</summary>
+        <returns>To be added.</returns>
+        <remarks>To be added.</remarks>
+      </Docs>
+    </Member>
+    <Member MemberName="InBoth">
+      <MemberSignature Language="C#" Value="public string InBoth { get; set; }" />
+      <MemberSignature Language="ILAsm" Value=".property instance string InBoth" />
+      <MemberType>Property</MemberType>
+      <AssemblyInfo apistyle="classic">
+        <AssemblyVersion>0.0.0.0</AssemblyVersion>
+      </AssemblyInfo>
+      <AssemblyInfo apistyle="unified">
+        <AssemblyVersion>0.0.0.0</AssemblyVersion>
+      </AssemblyInfo>
+      <ReturnValue>
+        <ReturnType>System.String</ReturnType>
+      </ReturnValue>
+      <Docs>
+        <summary>To be added.</summary>
+        <value>To be added.</value>
+        <remarks>To be added.</remarks>
+      </Docs>
+    </Member>
+    <Member MemberName="InBothClassic">
+      <MemberSignature Language="C#" Value="public string InBothClassic { get; set; }" />
+      <MemberSignature Language="ILAsm" Value=".property instance string InBothClassic" />
+      <MemberType>Property</MemberType>
+      <AssemblyInfo apistyle="classic">
+        <AssemblyVersion>0.0.0.0</AssemblyVersion>
+      </AssemblyInfo>
+      <ReturnValue>
+        <ReturnType>System.String</ReturnType>
+      </ReturnValue>
+      <Docs>
+        <summary>To be added.</summary>
+        <value>To be added.</value>
+        <remarks>To be added.</remarks>
+      </Docs>
+    </Member>
+    <Member MemberName="InBothMagicType">
+      <MemberSignature Language="C#" Value="public int InBothMagicType { get; set; }" apistyle="classic" />
+      <MemberSignature Language="ILAsm" Value=".property instance int32 InBothMagicType" apistyle="classic" />
+      <MemberSignature Language="C#" Value="public MyFramework.MyNamespace.nint InBothMagicType { get; set; }" apistyle="unified" />
+      <MemberSignature Language="ILAsm" Value=".property instance valuetype MyFramework.MyNamespace.nint InBothMagicType" apistyle="unified" />
+      <MemberType>Property</MemberType>
+      <AssemblyInfo apistyle="classic">
+        <AssemblyVersion>0.0.0.0</AssemblyVersion>
+      </AssemblyInfo>
+      <AssemblyInfo apistyle="unified">
+        <AssemblyVersion>0.0.0.0</AssemblyVersion>
+      </AssemblyInfo>
+      <ReturnValue>
+        <ReturnType apistyle="classic">System.Int32</ReturnType>
+        <ReturnType apistyle="unified">MyFramework.MyNamespace.nint</ReturnType>
+      </ReturnValue>
+      <Docs>
+        <summary>To be added.</summary>
+        <value>To be added.</value>
+        <remarks>To be added.</remarks>
+      </Docs>
+    </Member>
+    <Member MemberName="InBothUnified">
+      <MemberSignature Language="C#" Value="public string InBothUnified { get; set; }" />
+      <MemberSignature Language="ILAsm" Value=".property instance string InBothUnified" />
+      <MemberType>Property</MemberType>
+      <AssemblyInfo apistyle="unified">
+        <AssemblyVersion>0.0.0.0</AssemblyVersion>
+      </AssemblyInfo>
+      <ReturnValue>
+        <ReturnType>System.String</ReturnType>
+      </ReturnValue>
+      <Docs>
+        <summary>To be added.</summary>
+        <value>To be added.</value>
+        <remarks>To be added.</remarks>
+      </Docs>
+    </Member>
+    <Member MemberName="MyProperty">
+      <MemberSignature Language="C#" Value="public string MyProperty { get; set; }" />
+      <MemberSignature Language="ILAsm" Value=".property instance string MyProperty" />
+      <MemberType>Property</MemberType>
+      <AssemblyInfo apistyle="classic">
+        <AssemblyVersion>0.0.0.0</AssemblyVersion>
+      </AssemblyInfo>
+      <AssemblyInfo apistyle="unified">
+        <AssemblyVersion>0.0.0.0</AssemblyVersion>
+      </AssemblyInfo>
+      <ReturnValue>
+        <ReturnType>System.String</ReturnType>
+      </ReturnValue>
+      <Docs>
+        <summary>To be added.</summary>
+        <value>To be added.</value>
+        <remarks>To be added.</remarks>
+      </Docs>
+    </Member>
+  </Members>
+</Type>
diff --git a/mdoc/Test/en.expected-dropns-delete/MyFramework.MyNamespace/WillDelete.xml.remove b/mdoc/Test/en.expected-dropns-delete/MyFramework.MyNamespace/WillDelete.xml.remove
new file mode 100644
index 00000000..775b8aff
--- /dev/null
+++ b/mdoc/Test/en.expected-dropns-delete/MyFramework.MyNamespace/WillDelete.xml.remove
@@ -0,0 +1,49 @@
+<Type Name="WillDelete" FullName="MyFramework.MyNamespace.WillDelete">
+  <TypeSignature Language="C#" Value="public class WillDelete" />
+  <TypeSignature Language="ILAsm" Value=".class public auto ansi beforefieldinit WillDelete extends System.Object" />
+  <Base>
+    <BaseTypeName>System.Object</BaseTypeName>
+  </Base>
+  <Interfaces />
+  <Docs>
+    <summary>To be added.</summary>
+    <remarks>To be added.</remarks>
+  </Docs>
+  <Members>
+    <Member MemberName=".ctor">
+      <MemberSignature Language="C#" Value="public WillDelete ();" />
+      <MemberSignature Language="ILAsm" Value=".method public hidebysig specialname rtspecialname instance void .ctor() cil managed" />
+      <MemberType>Constructor</MemberType>
+      <AssemblyInfo apistyle="classic">
+        <AssemblyVersion>0.0.0.0</AssemblyVersion>
+      </AssemblyInfo>
+      <AssemblyInfo apistyle="unified">
+        <AssemblyVersion>0.0.0.0</AssemblyVersion>
+      </AssemblyInfo>
+      <Parameters />
+      <Docs>
+        <summary>To be added.</summary>
+        <remarks>To be added.</remarks>
+      </Docs>
+    </Member>
+    <Member MemberName="Name">
+      <MemberSignature Language="C#" Value="public string Name { get; set; }" />
+      <MemberSignature Language="ILAsm" Value=".property instance string Name" />
+      <MemberType>Property</MemberType>
+      <AssemblyInfo apistyle="classic">
+        <AssemblyVersion>0.0.0.0</AssemblyVersion>
+      </AssemblyInfo>
+      <AssemblyInfo apistyle="unified">
+        <AssemblyVersion>0.0.0.0</AssemblyVersion>
+      </AssemblyInfo>
+      <ReturnValue>
+        <ReturnType>System.String</ReturnType>
+      </ReturnValue>
+      <Docs>
+        <summary>To be added.</summary>
+        <value>To be added.</value>
+        <remarks>To be added.</remarks>
+      </Docs>
+    </Member>
+  </Members>
+</Type>
diff --git a/mdoc/Test/en.expected-dropns-delete/MyFramework.MyNamespace/nint.xml b/mdoc/Test/en.expected-dropns-delete/MyFramework.MyNamespace/nint.xml
new file mode 100644
index 00000000..2a8b2e27
--- /dev/null
+++ b/mdoc/Test/en.expected-dropns-delete/MyFramework.MyNamespace/nint.xml
@@ -0,0 +1,17 @@
+<Type Name="nint" FullName="MyFramework.MyNamespace.nint">
+  <TypeSignature Language="C#" Value="public struct nint" />
+  <TypeSignature Language="ILAsm" Value=".class public sequential ansi sealed beforefieldinit nint extends System.ValueType" />
+  <AssemblyInfo apistyle="unified">
+    <AssemblyName>DocTest-DropNS-unified-deletetest</AssemblyName>
+    <AssemblyVersion>0.0.0.0</AssemblyVersion>
+  </AssemblyInfo>
+  <Base>
+    <BaseTypeName>System.ValueType</BaseTypeName>
+  </Base>
+  <Interfaces />
+  <Docs>
+    <summary>To be added.</summary>
+    <remarks>To be added.</remarks>
+  </Docs>
+  <Members />
+</Type>
diff --git a/mdoc/Test/en.expected-dropns-delete/index.xml b/mdoc/Test/en.expected-dropns-delete/index.xml
new file mode 100644
index 00000000..0988450d
--- /dev/null
+++ b/mdoc/Test/en.expected-dropns-delete/index.xml
@@ -0,0 +1,23 @@
+<Overview>
+  <Assemblies>
+    <Assembly Name="DocTest-DropNS-unified-deletetest" Version="0.0.0.0">
+      <Attributes>
+        <Attribute>
+          <AttributeName>System.Diagnostics.Debuggable(System.Diagnostics.DebuggableAttribute+DebuggingModes.IgnoreSymbolStoreSequencePoints)</AttributeName>
+        </Attribute>
+        <Attribute>
+          <AttributeName>System.Runtime.CompilerServices.RuntimeCompatibility(WrapNonExceptionThrows=true)</AttributeName>
+        </Attribute>
+      </Attributes>
+    </Assembly>
+  </Assemblies>
+  <Remarks>To be added.</Remarks>
+  <Copyright>To be added.</Copyright>
+  <Types>
+    <Namespace Name="MyFramework.MyNamespace">
+      <Type Name="MyClass" Kind="Class" />
+      <Type Name="nint" Kind="Structure" />
+    </Namespace>
+  </Types>
+  <Title>DocTest-DropNS-classic-deletetest</Title>
+</Overview>
diff --git a/mdoc/Test/en.expected-dropns-delete/ns-MyFramework.MyNamespace.xml b/mdoc/Test/en.expected-dropns-delete/ns-MyFramework.MyNamespace.xml
new file mode 100644
index 00000000..74df75af
--- /dev/null
+++ b/mdoc/Test/en.expected-dropns-delete/ns-MyFramework.MyNamespace.xml
@@ -0,0 +1,6 @@
+<Namespace Name="MyFramework.MyNamespace">
+  <Docs>
+    <summary>To be added.</summary>
+    <remarks>To be added.</remarks>
+  </Docs>
+</Namespace>