diff --git a/build/Tests.lua b/build/Tests.lua
index ac5ace34..b403a7bf 100644
--- a/build/Tests.lua
+++ b/build/Tests.lua
@@ -38,7 +38,7 @@ function SetupManagedTestProject()
     SetupManagedProject()
 end
 
-function SetupTestGeneratorProject(name)
+function SetupTestGeneratorProject(name, depends)
   project(name .. ".Gen")
     SetupManagedTestProject()
     kind "ConsoleApp"
@@ -47,14 +47,19 @@ function SetupTestGeneratorProject(name)
 
     dependson { name .. ".Native" }
 
-    links
-    {
+    linktable = {
       "System.Core",
       "CppSharp.AST",
       "CppSharp.Generator",
-      "CppSharp.Generator.Tests"
+      "CppSharp.Generator.Tests",
     }
 
+    if depends ~= nil then
+      table.insert(linktable, depends .. ".Gen")
+    end
+
+    links(linktable)
+
     SetupParser()
 end
 
@@ -84,7 +89,7 @@ function SetupTestNativeProject(name, depends)
     files { "**.h", "**.cpp" }
 
     if depends ~= nil then
-      links { depends }
+      links { depends .. ".Native" }
     end
 end
 
@@ -117,7 +122,7 @@ function SetupTestProjectsCSharp(name, depends)
     linktable = { "CppSharp.Runtime" }
 
     if depends ~= nil then
-      table.insert(linktable, depends)
+      table.insert(linktable, depends .. ".CSharp")
     end
 
     links(linktable)
diff --git a/src/Generator/Driver.cs b/src/Generator/Driver.cs
index c015f2e6..1bd72493 100644
--- a/src/Generator/Driver.cs
+++ b/src/Generator/Driver.cs
@@ -32,6 +32,18 @@ namespace CppSharp
         public ASTContext ASTContext { get; private set; }
         public SymbolContext Symbols { get; private set; }
 
+        public struct TranslationUnitRenameInfo
+        {
+            public string translationUnit;
+            public string rootNamespaceName;
+        }
+        public static Dictionary<string, TranslationUnitRenameInfo> RootNamespaceRenames { get; private set; }
+
+        static Driver()
+        {
+            Driver.RootNamespaceRenames = new Dictionary<string, TranslationUnitRenameInfo>();
+        }
+
         public Driver(DriverOptions options, IDiagnosticConsumer diagnostics)
         {
             Options = options;
@@ -279,6 +291,8 @@ namespace CppSharp
 
             if (Options.GeneratePropertiesAdvanced)
                 TranslationUnitPasses.AddPass(new GetterSetterToPropertyAdvancedPass());
+
+            TranslationUnitPasses.AddPass(new RenameRootNamespacesPass());
         }
 
         public void ProcessCode()
diff --git a/src/Generator/Generators/CSharp/CSharpTextTemplate.cs b/src/Generator/Generators/CSharp/CSharpTextTemplate.cs
index b8a52db0..b80de910 100644
--- a/src/Generator/Generators/CSharp/CSharpTextTemplate.cs
+++ b/src/Generator/Generators/CSharp/CSharpTextTemplate.cs
@@ -105,6 +105,43 @@ namespace CppSharp.Generators.CSharp
 
         #region Identifiers
 
+        // Takes a declaration (type, class etc.) that is referenced from a context, and the context.
+        // If the referenced name needs a qualification in the context, add it. Otherwise, return just the name.
+        public string QualifiedIdentifierIfNeeded(Declaration context, Declaration reference)
+        {
+            var refNames = new Stack<string>();
+            var ctxNames = new Stack<string>();
+
+            var refCtx = reference;
+            while (refCtx != null)
+            {
+                if (!string.IsNullOrWhiteSpace(refCtx.Name))
+                    refNames.Push(refCtx.Name);
+                refCtx = refCtx.Namespace;
+            }
+
+            var ctxCtx = context;
+            while (ctxCtx != null)
+            {
+                if (!string.IsNullOrWhiteSpace(ctxCtx.Name))
+                    ctxNames.Push(ctxCtx.Name);
+                ctxCtx = ctxCtx.Namespace;
+            }
+
+            if (context.GenerationKind == GenerationKind.Generate && Options.GenerateLibraryNamespace)
+                ctxNames.Push(Options.OutputNamespace);
+            if (reference.GenerationKind == GenerationKind.Generate && Options.GenerateLibraryNamespace)
+                refNames.Push(Options.OutputNamespace);
+
+            while (refNames.Count > 1 && ctxNames.Count > 1 &&refNames.Peek() == ctxNames.Peek())
+            {
+                refNames.Pop();
+                ctxNames.Pop();
+            }
+
+            return string.Join(".", refNames);
+        }
+
         public string QualifiedIdentifier(Declaration decl)
         {
             var names = new List<string> { decl.Name };
@@ -633,7 +670,7 @@ namespace CppSharp.Generators.CSharp
                 bases.AddRange(
                     from @base in @class.Bases
                     where @base.IsClass
-                    select QualifiedIdentifier(@base.Class));
+                    select QualifiedIdentifierIfNeeded(@class, @base.Class));
             }
 
             if (@class.IsGenerated)
@@ -1781,7 +1818,7 @@ namespace CppSharp.Generators.CSharp
             var hasBaseClass = @class.HasBaseClass && @class.BaseClass.IsRefType;
             if (hasBaseClass)
                 WriteLineIndent(": base(({0}.Internal*) native{1})",
-                    @class.BaseClass.Name, @class.IsAbstractImpl ? ", true" : string.Empty);
+                    QualifiedIdentifierIfNeeded(@class, @class.BaseClass), @class.IsAbstractImpl ? ", true" : string.Empty);
 
             WriteStartBraceIndent();
 
@@ -1828,7 +1865,7 @@ namespace CppSharp.Generators.CSharp
                     // Allocate memory for a new native object and call the ctor.
                     WriteLine("var ret = Marshal.AllocHGlobal({0});", @class.Layout.Size);
                     WriteLine("{0}.Internal.{1}(ret, new global::System.IntPtr(&native));",
-                        QualifiedIdentifier(@class), GetFunctionNativeIdentifier(copyCtorMethod));
+                        QualifiedIdentifierIfNeeded(@class, @class), GetFunctionNativeIdentifier(copyCtorMethod));
                     WriteLine("return ({0}.Internal*) ret;", className);
                 }
                 else
@@ -2243,7 +2280,7 @@ namespace CppSharp.Generators.CSharp
                 if (construct == null)
                 {
                     WriteLine("var {0} = new {1}.Internal();", GeneratedIdentifier("ret"),
-                        QualifiedIdentifier(retClass.OriginalClass ?? retClass));
+                        QualifiedIdentifierIfNeeded(function, retClass.OriginalClass ?? retClass));
                 }
                 else
                 {
diff --git a/src/Generator/Generators/CSharp/CSharpTypePrinter.cs b/src/Generator/Generators/CSharp/CSharpTypePrinter.cs
index b3a85263..7897768d 100644
--- a/src/Generator/Generators/CSharp/CSharpTypePrinter.cs
+++ b/src/Generator/Generators/CSharp/CSharpTypePrinter.cs
@@ -551,9 +551,6 @@ namespace CppSharp.Generators.CSharp
             var ctx = decl.Namespace;
             while (ctx != null)
             {
-                if (ctx is TranslationUnit)
-                    break;
-
                 if (!string.IsNullOrWhiteSpace(ctx.Name))
                     names.Add(ctx.Name);
 
diff --git a/src/Generator/Passes/RenameRootNamespaces.cs b/src/Generator/Passes/RenameRootNamespaces.cs
new file mode 100644
index 00000000..565bcfd2
--- /dev/null
+++ b/src/Generator/Passes/RenameRootNamespaces.cs
@@ -0,0 +1,39 @@
+using CppSharp.AST;
+using System;
+using System.Collections.Generic;
+
+namespace CppSharp.Passes
+{
+    // This pass visits all the translation units and checks if they originate from library being processed or
+    // from some other library that is being depended upon. It will rename the root namespaces of all the "foreign"
+    // libraries so that there wouldn't be clashes and so that the code generation phase would be able to generate
+    // names with fully qualified namespace prefixes.
+    public class RenameRootNamespacesPass : TranslationUnitPass
+    {
+
+        public override bool VisitTranslationUnit(TranslationUnit unit)
+        {
+            if (!base.VisitTranslationUnit(unit))
+                return false;
+
+
+            var fileName = unit.TranslationUnit.FileName;
+            if (Driver.RootNamespaceRenames.ContainsKey(fileName))
+            {
+                var rootNamespace = Driver.RootNamespaceRenames[fileName].rootNamespaceName;
+                if (this.Driver.Options.OutputNamespace != rootNamespace)
+                    unit.Name = rootNamespace;
+            }
+            else if (unit.GenerationKind == GenerationKind.Generate)
+            {
+                Driver.RootNamespaceRenames.Add(fileName, new Driver.TranslationUnitRenameInfo
+                {
+                    translationUnit = fileName,
+                    rootNamespaceName = Driver.Options.OutputNamespace,
+                });
+            }
+            return true;
+        }
+
+    }
+}
\ No newline at end of file
diff --git a/tests/NamespacesBase/NamespacesBase.cpp b/tests/NamespacesBase/NamespacesBase.cpp
index 07685d46..a91800f2 100644
--- a/tests/NamespacesBase/NamespacesBase.cpp
+++ b/tests/NamespacesBase/NamespacesBase.cpp
@@ -10,4 +10,4 @@ Base::Base(int i)
 Base::Base()
 {
 
-}
\ No newline at end of file
+}
diff --git a/tests/NamespacesBase/NamespacesBase.cs b/tests/NamespacesBase/NamespacesBase.cs
index 871a4204..d274bb12 100644
--- a/tests/NamespacesBase/NamespacesBase.cs
+++ b/tests/NamespacesBase/NamespacesBase.cs
@@ -32,7 +32,5 @@ namespace CppSharp.Tests
         {
             ConsoleDriver.Run(new NamespacesBaseTests(GeneratorKind.CSharp));
         }
-
     }
 }
-
diff --git a/tests/NamespacesBase/NamespacesBase.h b/tests/NamespacesBase/NamespacesBase.h
index b431de6c..0caa7020 100644
--- a/tests/NamespacesBase/NamespacesBase.h
+++ b/tests/NamespacesBase/NamespacesBase.h
@@ -1,5 +1,28 @@
 #include "../Tests.h"
 
+
+namespace OverlappingNamespace
+{
+    enum ColorsEnum {
+        white,
+        black,
+        red,
+        blue,
+        green,
+    };
+
+    class InBaseLib
+    {
+    public:
+        InBaseLib()
+        {
+        
+        };
+    };
+}
+
+
+
 class DLL_API Base
 {
 public:
@@ -8,4 +31,4 @@ public:
 
 private:
     int b;
-};
\ No newline at end of file
+};
diff --git a/tests/NamespacesDerived/NamespacesDerived.cpp b/tests/NamespacesDerived/NamespacesDerived.cpp
index 4bb67564..88c00324 100644
--- a/tests/NamespacesDerived/NamespacesDerived.cpp
+++ b/tests/NamespacesDerived/NamespacesDerived.cpp
@@ -1,6 +1,60 @@
 #include "NamespacesDerived.h"
 
 
-Derived::Derived() : Base(10), component(5)
+OverlappingNamespace::InDerivedLib::InDerivedLib() : parentNSComponent(), color(black)
 {
 }
+
+Derived::Derived() : Base(10), baseComponent(5), nestedNSComponent(), color(OverlappingNamespace::blue)
+{
+}
+
+Base Derived::getBase()
+{
+    return baseComponent;
+}
+
+void Derived::setBase(Base b)
+{
+    baseComponent = b;
+}
+
+OverlappingNamespace::InBaseLib Derived::getNestedNSComponent()
+{
+    return nestedNSComponent;
+}
+
+void Derived::setNestedNSComponent(OverlappingNamespace::InBaseLib c)
+{
+    nestedNSComponent = c;
+}
+
+
+Base2::Base2()
+{
+}
+
+
+Derived2::Derived2() : Base2()
+{
+}
+
+Base2 Derived2::getBase()
+{
+    return baseComponent;
+}
+
+void Derived2::setBase(Base2 b)
+{
+    baseComponent = b;
+}
+
+OverlappingNamespace::InDerivedLib Derived2::getNestedNSComponent()
+{
+    return nestedNSComponent;
+}
+
+void Derived2::setNestedNSComponent(OverlappingNamespace::InDerivedLib c)
+{
+    nestedNSComponent = c;
+}
diff --git a/tests/NamespacesDerived/NamespacesDerived.cs b/tests/NamespacesDerived/NamespacesDerived.cs
index c9f49ffe..8addbe3a 100644
--- a/tests/NamespacesDerived/NamespacesDerived.cs
+++ b/tests/NamespacesDerived/NamespacesDerived.cs
@@ -15,7 +15,6 @@ namespace CppSharp.Tests
 
         public override void SetupPasses(Driver driver)
         {
-            driver.Options.DependentNameSpaces.Add("NamespacesBase");
         }
 
         public override void Preprocess(Driver driver, ASTContext ctx)
@@ -39,6 +38,7 @@ namespace CppSharp.Tests
 
         public static void Main(string[] args)
         {
+            ConsoleDriver.Run(new NamespacesBaseTests(GeneratorKind.CSharp));
             ConsoleDriver.Run(new NamespacesDerivedTests(GeneratorKind.CSharp));
         }
 
diff --git a/tests/NamespacesDerived/NamespacesDerived.h b/tests/NamespacesDerived/NamespacesDerived.h
index 091fb7c4..5f4d5287 100644
--- a/tests/NamespacesDerived/NamespacesDerived.h
+++ b/tests/NamespacesDerived/NamespacesDerived.h
@@ -1,13 +1,60 @@
 #include "../Tests.h"
 #include "../NamespacesBase/NamespacesBase.h"
 
+// Namespace clashes with NamespacesBase.OverlappingNamespace
+// Test whether qualified names turn out right.
+namespace OverlappingNamespace
+{
+
+    class InDerivedLib
+    {
+    public:
+        InDerivedLib();
+        Base parentNSComponent;
+        ColorsEnum color;
+    };
+}
+
+
+// Using a type imported from a different library.
 class DLL_API Derived : public Base
 {
 public:
     Derived();
 
-    Base component;
+    Base baseComponent;
+    Base getBase();
+    void setBase(Base);
+
+    OverlappingNamespace::InBaseLib nestedNSComponent;
+    OverlappingNamespace::InBaseLib getNestedNSComponent();
+    void setNestedNSComponent(OverlappingNamespace::InBaseLib);
+
+    OverlappingNamespace::ColorsEnum color;
 
 private:
     int d;
-};
\ No newline at end of file
+};
+
+
+// For reference: using a type derived in the same library
+class Base2
+{
+public:
+    Base2();
+};
+
+class Derived2 : public Base2
+{
+public:
+    Derived2();
+
+    Base2 baseComponent;
+    Base2 getBase();
+    void setBase(Base2);
+
+    OverlappingNamespace::InDerivedLib nestedNSComponent;
+    OverlappingNamespace::InDerivedLib getNestedNSComponent();
+    void setNestedNSComponent(OverlappingNamespace::InDerivedLib);
+
+};
diff --git a/tests/NamespacesDerived/premake4.lua b/tests/NamespacesDerived/premake4.lua
index 0056d5f6..ad98cb93 100644
--- a/tests/NamespacesDerived/premake4.lua
+++ b/tests/NamespacesDerived/premake4.lua
@@ -1,4 +1,4 @@
 group "Tests/Namespaces"
-  SetupTestGeneratorProject("NamespacesDerived")
-  SetupTestNativeProject("NamespacesDerived", "NamespacesBase.Native")
-  SetupTestProjectsCSharp("NamespacesDerived", "NamespacesBase.CSharp")
\ No newline at end of file
+  SetupTestGeneratorProject("NamespacesDerived", "NamespacesBase")
+  SetupTestNativeProject("NamespacesDerived",    "NamespacesBase")
+  SetupTestProjectsCSharp("NamespacesDerived",   "NamespacesBase")
\ No newline at end of file