diff --git a/Perspex.Animation/PropertyTransitions.cs b/Perspex.Animation/PropertyTransitions.cs
index 9b578fc942..ff902d816d 100644
--- a/Perspex.Animation/PropertyTransitions.cs
+++ b/Perspex.Animation/PropertyTransitions.cs
@@ -6,6 +6,8 @@
 
 namespace Perspex.Animation
 {
+    using Perspex.Collections;
+
     public class PropertyTransitions : PerspexList<PropertyTransition>
     {
     }
diff --git a/Perspex.Base/IReadOnlyPerspexList.cs b/Perspex.Base/Collections/IReadOnlyPerspexList.cs
similarity index 94%
rename from Perspex.Base/IReadOnlyPerspexList.cs
rename to Perspex.Base/Collections/IReadOnlyPerspexList.cs
index 87b7074bd2..78b7e7392e 100644
--- a/Perspex.Base/IReadOnlyPerspexList.cs
+++ b/Perspex.Base/Collections/IReadOnlyPerspexList.cs
@@ -4,7 +4,7 @@
 // </copyright>
 // -----------------------------------------------------------------------
 
-namespace Perspex
+namespace Perspex.Collections
 {
     using System.Collections.Generic;
     using System.Collections.Specialized;
diff --git a/Perspex.Base/PerspexList.cs b/Perspex.Base/Collections/PerspexList.cs
similarity index 99%
rename from Perspex.Base/PerspexList.cs
rename to Perspex.Base/Collections/PerspexList.cs
index 13fa97801c..8107202560 100644
--- a/Perspex.Base/PerspexList.cs
+++ b/Perspex.Base/Collections/PerspexList.cs
@@ -4,7 +4,7 @@
 // </copyright>
 // -----------------------------------------------------------------------
 
-namespace Perspex
+namespace Perspex.Collections
 {
     using System;
     using System.Collections;
diff --git a/Perspex.Base/PerspexListExtensions.cs b/Perspex.Base/Collections/PerspexListExtensions.cs
similarity index 99%
rename from Perspex.Base/PerspexListExtensions.cs
rename to Perspex.Base/Collections/PerspexListExtensions.cs
index 13ee014d49..62c754f2b3 100644
--- a/Perspex.Base/PerspexListExtensions.cs
+++ b/Perspex.Base/Collections/PerspexListExtensions.cs
@@ -4,7 +4,7 @@
 // </copyright>
 // -----------------------------------------------------------------------
 
-namespace Perspex
+namespace Perspex.Collections
 {
     using System;
     using System.Collections.Generic;
diff --git a/Perspex.Base/Perspex.Base.csproj b/Perspex.Base/Perspex.Base.csproj
index 715391fbfa..1f1414e13d 100644
--- a/Perspex.Base/Perspex.Base.csproj
+++ b/Perspex.Base/Perspex.Base.csproj
@@ -38,10 +38,10 @@
     <Compile Include="Contract.cs" />
     <Compile Include="Diagnostics\PerspexPropertyValue.cs" />
     <Compile Include="IDescription.cs" />
-    <Compile Include="PerspexListExtensions.cs" />
+    <Compile Include="Collections\PerspexListExtensions.cs" />
     <Compile Include="IObservableDescription.cs" />
-    <Compile Include="IReadOnlyPerspexList.cs" />
-    <Compile Include="PerspexList.cs" />
+    <Compile Include="Collections\IReadOnlyPerspexList.cs" />
+    <Compile Include="Collections\PerspexList.cs" />
     <Compile Include="PerspexObject.cs" />
     <Compile Include="PerspexProperty.cs" />
     <Compile Include="PerspexPropertyChangedEventArgs.cs" />
diff --git a/Perspex.Controls/ColumnDefinitions.cs b/Perspex.Controls/ColumnDefinitions.cs
index 73656b8854..f8c9928eb8 100644
--- a/Perspex.Controls/ColumnDefinitions.cs
+++ b/Perspex.Controls/ColumnDefinitions.cs
@@ -6,6 +6,8 @@
 
 namespace Perspex.Controls
 {
+    using Perspex.Collections;
+
     public class ColumnDefinitions : PerspexList<ColumnDefinition>
     {
     }
diff --git a/Perspex.Controls/Controls.cs b/Perspex.Controls/Controls.cs
index 5214e59ade..353ecf03db 100644
--- a/Perspex.Controls/Controls.cs
+++ b/Perspex.Controls/Controls.cs
@@ -7,6 +7,7 @@
 namespace Perspex.Controls
 {
     using System.Collections.Generic;
+    using Perspex.Collections;
 
     public class Controls : PerspexList<Control>
     {
diff --git a/Perspex.Controls/DataTemplates.cs b/Perspex.Controls/DataTemplates.cs
index 1f81fde90f..7de64339ed 100644
--- a/Perspex.Controls/DataTemplates.cs
+++ b/Perspex.Controls/DataTemplates.cs
@@ -6,13 +6,7 @@
 
 namespace Perspex.Controls
 {
-    using System;
-    using System.Collections;
-    using System.Collections.Generic;
-    using System.Collections.Specialized;
-    using System.Linq;
-    using System.Reactive;
-    using System.Reactive.Subjects;
+    using Perspex.Collections;
 
     public class DataTemplates : PerspexList<DataTemplate>
     {
diff --git a/Perspex.Controls/Grid.cs b/Perspex.Controls/Grid.cs
index 789c4e06c7..b5e57cc178 100644
--- a/Perspex.Controls/Grid.cs
+++ b/Perspex.Controls/Grid.cs
@@ -9,6 +9,7 @@ namespace Perspex.Controls
     using System;
     using System.Collections.Generic;
     using System.Linq;
+    using Perspex.Collections;
 
     public class Grid : Panel
     {
diff --git a/Perspex.Controls/RowDefinitions.cs b/Perspex.Controls/RowDefinitions.cs
index 60ea0da556..7affaa019f 100644
--- a/Perspex.Controls/RowDefinitions.cs
+++ b/Perspex.Controls/RowDefinitions.cs
@@ -6,6 +6,8 @@
 
 namespace Perspex.Controls
 {
+    using Perspex.Collections;
+
     public class RowDefinitions : PerspexList<RowDefinition>
     {
     }
diff --git a/Perspex.SceneGraph/IVisual.cs b/Perspex.SceneGraph/IVisual.cs
index 12a1104864..72a38d1703 100644
--- a/Perspex.SceneGraph/IVisual.cs
+++ b/Perspex.SceneGraph/IVisual.cs
@@ -6,7 +6,7 @@
 
 namespace Perspex
 {
-    using System.Collections.Generic;
+    using Perspex.Collections;
     using Perspex.Media;
 
     /// <summary>
diff --git a/Perspex.SceneGraph/Visual.cs b/Perspex.SceneGraph/Visual.cs
index 28eed3521f..2f9351fc12 100644
--- a/Perspex.SceneGraph/Visual.cs
+++ b/Perspex.SceneGraph/Visual.cs
@@ -12,6 +12,7 @@ namespace Perspex
     using System.Linq;
     using System.Reactive.Linq;
     using Perspex.Animation;
+    using Perspex.Collections;
     using Perspex.Media;
     using Perspex.Rendering;
     using Splat;
diff --git a/Perspex.Styling/Styles.cs b/Perspex.Styling/Styles.cs
index b6e1111b54..5e95978abe 100644
--- a/Perspex.Styling/Styles.cs
+++ b/Perspex.Styling/Styles.cs
@@ -6,6 +6,8 @@
 
 namespace Perspex.Styling
 {
+    using Perspex.Collections;
+
     public class Styles : PerspexList<IStyle>, IStyle
     {
         public void Attach(IStyleable control)
diff --git a/TestApplication/Program.cs b/TestApplication/Program.cs
index 297e244473..f3543bff94 100644
--- a/TestApplication/Program.cs
+++ b/TestApplication/Program.cs
@@ -2,6 +2,7 @@
 using System.Reactive.Linq;
 using Perspex;
 using Perspex.Animation;
+using Perspex.Collections;
 using Perspex.Controls;
 using Perspex.Controls.Primitives;
 using Perspex.Controls.Shapes;