我有一个例外:No issuer certificate for certificate in certification path found.
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
这是什么意思?