Added syntax highlighting to intro.md

Docs/intro.md

@@ -36,32 +36,36 @@ Attached Properties. So the challenge became to improve it.
 
 Delaring a DP in WPF looks something like this:
 
-	public static readonly DependencyProperty PropertyDeclaration =
-        DependencyProperty.Register(
-            "PropertyName",
-            typeof(PropertyType),
-            typeof(OwnerClass),
-            new FrameworkPropertyMetadata(
-                default(PropertyType),
-                FrameworkPropertyMetadataOptions.Inherits));
-
-	public PropertyType PropertyName
-	{
-	    get { return (PropertyType)this.GetValue(PropertyDeclaration); }
-	    set { this.SetValue(PropertyDeclaration, value); }
-	}
+```csharp
+public static readonly DependencyProperty PropertyDeclaration =
+DependencyProperty.Register(
+    "PropertyName",
+    typeof(PropertyType),
+    typeof(OwnerClass),
+    new FrameworkPropertyMetadata(
+        default(PropertyType),
+        FrameworkPropertyMetadataOptions.Inherits));
+
+public PropertyType PropertyName
+{
+    get { return (PropertyType)this.GetValue(PropertyDeclaration); }
+    set { this.SetValue(PropertyDeclaration, value); }
+}
+```
 
 Eww! All that just to declare a single property. There's **A LOT** of boilerplate there. With 
 generics and default parameters we can at least make it look a bit nicer:
 
-    public static readonly PerspexProperty<PropertyType> PropertyDeclaration =
-        PerspexProperty.Register<OwnerClass, PropertyType>("PropertyName", inherits: true);
+```csharp
+public static readonly PerspexProperty<PropertyType> PropertyDeclaration =
+PerspexProperty.Register<OwnerClass, PropertyType>("PropertyName", inherits: true);
 
-	public PropertyType PropertyName
-	{
-	    get { return this.GetValue(PropertyDeclaration); }
-	    set { this.SetValue(PropertyDeclaration, value); }
-	}
+public PropertyType PropertyName
+{
+    get { return this.GetValue(PropertyDeclaration); }
+    set { this.SetValue(PropertyDeclaration, value); }
+}
+```
 
 What can we see here?
 
@@ -77,34 +81,42 @@ write typeof() twice.
 Binding in Perspex uses Reactive Extensions' IObservable. To bind an IObservable to a property,
 use the Bind method:
 
-    control.Bind(BorderProperty, someObject.SomeObservable());
+```csharp
+control.Bind(BorderProperty, someObject.SomeObservable());
+```
 
 Note that because PerspexProperty is typed, we can check that the observable is of the correct type.
 
 To get the value of a property as an observable, call GetObservable():
 
-    var observable = control.GetObservable(Control.FooProperty);
+```csharp
+var observable = control.GetObservable(Control.FooProperty);
+```
 
 ## Attached Properties and Binding Pt 2
 
 Attached properties are set just like in WPF, using SetValue. But what about the [] operator? C# 6 
 will allow us to use [] array subscripts in object initializers. So how does this look?
 
-    var control = new Control
-	{
-		Property1 = "Foo",
-        [Attached.Property] = "Bar",
-	}
+```csharp
+var control = new Control
+{
+	Property1 = "Foo",
+[Attached.Property] = "Bar",
+}
+```
 
 
 Nice... Lets take this further:
 
-    var control = new Control
-	{
-		Property1 = "Foo",
-        [Attached.Property] = "Bar",
-		[!Property2] = something.SomeObservable,
-	}
+```csharp
+var control = new Control
+{
+	Property1 = "Foo",
+[Attached.Property] = "Bar",
+	[!Property2] = something.SomeObservable,
+}
+```
 
 Yep, by putting a bang in front of the property name you can **bind** to a property (attached or 
 otherwise) from the object initializer.
@@ -120,12 +132,14 @@ Binding to a property on another control? Easy:
 
 Two way binding? Just add two bangs:
 
-    var control = new Control
-	{
-		Property1 = "Foo",
-        [Attached.Property] = "Bar",
-		[!!Property2] = anotherControl[!!Property1],
-	}
+```csharp
+var control = new Control
+{
+	Property1 = "Foo",
+[Attached.Property] = "Bar",
+	[!!Property2] = anotherControl[!!Property1],
+}
+```
 
 ## Visual and Logical trees
 
@@ -144,36 +158,42 @@ property, which is determined by...
 Styles in Perspex diverge from styles in WPF quite a lot, and move towards a more CSS-like system.
 It's probably easiest to show in an example. Here is the default style for the CheckBox control:
 
-    new Style(x => x.OfType<CheckBox>())
-    {
-        Setters = new[]
-        {
-            new Setter(Button.TemplateProperty, ControlTemplate.Create<CheckBox>(this.Template)),
-        },
-    },
-    new Style(x => x.OfType<CheckBox>().Template().Id("checkMark"))
-    {
-        Setters = new[]
-        {
-            new Setter(Shape.IsVisibleProperty, false),
-        },
-    },
-    new Style(x => x.OfType<CheckBox>().Class(":checked").Template().Id("checkMark"))
-    {
-        Setters = new[]
-        {
-            new Setter(Shape.IsVisibleProperty, true),
-        },
-    },
+```csharp
+new Style(x => x.OfType<CheckBox>())
+{
+Setters = new[]
+{
+    new Setter(Button.TemplateProperty, ControlTemplate.Create<CheckBox>(this.Template)),
+},
+},
+new Style(x => x.OfType<CheckBox>().Template().Id("checkMark"))
+{
+Setters = new[]
+{
+    new Setter(Shape.IsVisibleProperty, false),
+},
+},
+new Style(x => x.OfType<CheckBox>().Class(":checked").Template().Id("checkMark"))
+{
+Setters = new[]
+{
+    new Setter(Shape.IsVisibleProperty, true),
+},
+},
+```
 
 Let's see what's happening here:
 
-    new Style(x => x.OfType<CheckBox>())
+```csharp
+new Style(x => x.OfType<CheckBox>())
+```
 
 The constructor for the Style class defines the selector. Here we're saying "*this style applies to 
 all controls in the the visual tree of type CheckBox*". A more complex selector:
 
-    new Style(x => x.OfType<CheckBox>().Class(":checked").Template().Id("checkMark"))
+```csharp
+new Style(x => x.OfType<CheckBox>().Class(":checked").Template().Id("checkMark"))
+```
 
 This selector matches "*all controls with Id == "checkMark" in the template of a CheckBox with the
 class ':checked'"*. Each control has an Id property, and Ids in templates are considered to be in a