Added HMAC validate code example (#150) · docusign/code-examples-csharp@79b2882

Process completed with exit code 1.

'WebRequest.Create(string)' is obsolete: 'WebRequest, HttpWebRequest, ServicePoint, and WebClient are obsolete. Use HttpClient instead.'

Converting null literal or possible null value to non-nullable type.

Nullable value type may be null.

'WebRequest.CreateHttp(string)' is obsolete: 'WebRequest, HttpWebRequest, ServicePoint, and WebClient are obsolete. Use HttpClient instead.'

The variable 'redirectToSecondCodeExample' is assigned but its value is never used

The field 'FocusedView.dsIntegrationKey' is never used

Single line comment should begin with a space.

Single line comment should begin with a space.

Single line comment should begin with a space.

Single line comment should begin with a space.

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