ambiguity between variables in C#

Question

I want to start by saying I did search first, and found a lot of similar issues on various other things, but not this problem exactly.

I have this code:

Answer 1

In my case it was resolved renaming the class agregarPropiedad by agregarPropiedad2.

.CS

public partial class agregarPropiedad2

Designer.CS

public partial class agregarPropiedad2

ASPX

Inherits="ProjectName.agregarPropiedad2"