title: No issuer certificate
body: <p>I have an exception : <code>No issuer certificate for certificate in certification path found.</code></p>
  
  <pre><code>PkixBuilderParameters builderParams = new PkixBuilderParameters(rootCerts, holder);
  builderParams.IsRevocationEnabled = false;
  X509CollectionStoreParameters intermediateStoreParameters =
                  new X509CollectionStoreParameters(intermediateCerts);
  builderParams.AddStore(X509StoreFactory.Create("Certificate/Collection", 
                  intermediateStoreParameters));
  PkixCertPathBuilderResult result = 
                  builder.Build(builderParams); // exception in this line
  </code></pre>
  
  <p>What does this mean?</p>