Hi Hanifeshaik,
I understand that you want to create a file/folder in your office 365 account using the Asp.Net Web Forms Application. Because it’s related to development, and our forum focus on Office 365 services related questions, for professional assistance with this question, it is suggested you post the requirement in our MSDN forum. The engineers there will give you some suggestions according to the query.
For your reference, below is a similar thread in the MSDN forum:
Office 365 in ASP.NET C# web application
Thanks for your understanding.
Best regards,
Rachel Zhang