<ul><li>Implementing OAuth 2.0 in ASP.NET API with secure token transmission is crucial for user authentication and authorization.</li><li>Selecting the appropriate grant type, such as authorization code, client credentials, or implicit grant, is important for security.</li><li>Ensure secure storage of access tokens, utilize token expiration and refresh mechanisms, and regularly rotate client secrets.</li><li>Implement proper error handling, follow OAuth 2.0 specifications, and regularly update security measures to address emerging threats.</li></ul>

Securely Sending Tokens on Redirect: ASP.NET API & OAuth Best Practices

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