Tool to import certificates into the My\Intermediate Certificate store.

ImportIntermediateCerts.cs

// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the https://github.com/dotnet/corefx project root for more information.

// Usage: <ImportIntermediateCerts.exe> <certificateChain.p7b>
// Importing certificates into the Intermediate Certificate store is required if the remote server
// has access only to the Root CA but not to the entire chain.

using System;
using System.Security.Cryptography.X509Certificates;

namespace CertificateTool
{
    class Program
    {
        static void Main(string[] args)
        {
            if (args.Length < 1)
            {
                Console.WriteLine("Missing path to certificate collection file (*.p7b).");
                return;
            }

            Console.WriteLine($"Importing certificate {args[0]}.");
            var certs = new X509Certificate2Collection();
            certs.Import(args[0]);

            Console.WriteLine("Opening store.");
            var store = new X509Store(StoreName.CertificateAuthority, StoreLocation.CurrentUser);
            store.Open(OpenFlags.ReadWrite);

            Console.WriteLine($"Importing {certs.Count} certificates");
            store.AddRange(certs);

            store.Close();
        }
    }
}