What is the antonym of wall of text? That is, a text where every paragraph is a single sentence.
If the antonym doesn't exist, how can the opposite of wall of text be described grammar-technically? There must be a term or a description for this common type of error in writing.
Exhibit A 
object is valid for all .NET versions.
It is the base type that all other types inherit from, so any type can be cast to object.
You can't dynamically add and change anything on a variable declared as object.
The declaration is a statically typed and checked by the compiler.
dynamic is new for .NET 4.0.
It allows you do dynamically add and change properties and methods without the compiler checking them (so if what you wrote is wrong you will only find out at runtime).