using System;

using System.Security.Cryptography.X509Certificates;

​

public class Program

{

    public static void Main()

    {

        var base64Data = "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";

        var certificate = new X509Certificate2(Convert.FromBase64String(base64Data));

        Console.WriteLine(certificate);

    }

}

​