post a picture using C# and webRequest

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C#

Python

I have the following python code how to post a picture through webservice:

product_image = requests.post('https://client.planorama.com/tapi/v1/product_image/',
data={ 'product_id': 1784682 }, files={ "file": open(my_image.jpg, 'rb') } )

Can anyone help me to do the same thing in C#,