Unity, huh, how?
The type 'Foo' already contains a definition for 'Bar'
This error is shown when there are conflicting types in the same type.
Don't reuse names in a type.
This might be caused by declaring a subtype of the same name as a member:
public class Example : MonoBehaviour
{
public class Data
{
...
}
// 
Incorrect. Data is already declared above, you cannot declare a member called Data.
public Data Data { get; private set; }
}Or it might be caused by declaring two members with the same name:
public class Example : MonoBehaviour
{
public float Speed;
// Incorrect. Speed is already declared above, you cannot declare a member called Speed.
public float Speed;
}