C# C加载需要密码的证书

我有下面的代码，当只有一个证书时，我可以选择该证书，如果有多个证书，我会让用户通过呼叫选择该证书

var certificates = X509Certificate2UI.SelectFromCollection(store.Certificates,
                "Digital Certificates", "Select a certificate from the following list:",
                X509SelectionFlag.SingleSelection);

我注意到的一件事是，当只有一个证书时，我不需要输入预期的密码，因为我使用该证书从我的计算机登录；但有多个证书，我必须键入密码，我不想，因为我已经键入了密码，当我登录到windows系统；任何帮助/想法都将不胜感激

完整代码段：

X509Certificate2 certificate = null;

var store = new X509Store(StoreName.My, StoreLocation.CurrentUser);
try
{
    store.Open(OpenFlags.ReadOnly | OpenFlags.OpenExistingOnly);

    if (store.Certificates.Count == 1) {
        //Return the certificate present.
        certificate = store.Certificates[0];
    }
    else if (store.Certificates.Count > 0)
    {
        // Request the user to select a certificate 
        var certificates = X509Certificate2UI.SelectFromCollection(store.Certificates,
            "Digital Certificates", "Select a certificate from the following list:",
            X509SelectionFlag.SingleSelection);

        // Check if one has been returned
        if (certificates.Count == 1) {
            certificate = certificates[0];
        }
        else {
            throw new ArgumentException("Please select a certificate to publish PnL to Flash");
        }
    }
    else {
        throw new ArgumentException("There is no certificate available to publish PnL to flash, please contact support.");
    }
}
finally {
    store.Close();
}
return certificate;

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嗯，这取决于证书的状态