The weight field was recently added to variations in Square. It is not currently accessible in the Square API. Can we get it added? The weight is used in shipping calculations, and would be very helpful to set in the API calls.
Are you using the SDK or are you making REST API calls. 
Using the SDK from a .NET project
Okay, this isn’t a documented field which is why its not in the SDK. I’ve reached out to the team about this.