Style-Guide.md

@@ -76,4 +76,17 @@ If a file contains only a single class, the filename should match the name of th
 
 ### Extension Methods
 
-All definitions of extension methods must be in the file `ExtensionMethods.cs`.
+All definitions of extension methods must be in the file `ExtensionMethods.cs`.
+
+### Type Casting
+
+Casts shouldn't be used unless needed, but if they are necessary, they look like this:
+```csharp
+float f = (float) someInt;
+```
+
+### Numeric Literals
+
+A floating-point literal between 0 and 1 always has a leading 0 before the decimal point, like this: `float f = 0.1f;`.
+
+A floating-point literal with no fractional part is preferably written with a ".0" suffix, like this: `float f = 42.0f`, but it's not a strict requirement.