gistfile1.cs

public class ObserveringType
{
    // Use Is prefix here because the purpose of this class it to describe the other class
    public bool IsEnabled { get; protected set; }

    public ObservingType(SomeType type) { ... }
}


public class SomeType
{
    // Don't use Is prefix here because you are talking about yourself.
    public bool Enabled { get; protected set; }
}