How to get gmail contacts in ASP using oauth 2.0

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ASP.NET

C#3.5

google-api

Hi,

Please help me get the list of contacts. Actually i went through the documentation of google and i got the below code it is asking me to Add authorization token following instructions from the document i have created new OAuth 2.0 client IDs in google console.

How to add the authorisation token to the below mentioned code.

What I have tried:

This is what i tried to do.

RequestSettings settings = new RequestSettings("YOUR_APPLICATION_NAME");
// Add authorization token.
// ...
ContactsRequest cr = new ContactsRequest(settings);