Format for a partial class.
File - MyClass.1.cs
public partial MyClass
...
File - MyClass.2.cs
public partial MyClass
...
File names are irrelevant and exist merely so show that two files would be used.
The only requirement is that you have declarations for the class in two or more places (can just have one class but that really is ignoring the point.)
The compiler and all users treat the class as ONE class.
It is possible from your question that you think it might treat it as two classes. If so then the answer to your question is no it is not possible.