The first step is done. I took the degenerate case where a method has no parameters, and made that a simple getter:
public static pi => decimal { return( 3.141592 ); }
Setters will look a little odd, but similar to other phrase definitions:
public class SetExample{ private int _foo; public Foo = (int value) => void{ _foo = value; }}
The behavior of each isn't really going to change, just consolidating the syntax and compiler a bit.