in net/JetBrains.SignatureVerifier/src/Crypt/X509CertificateEquComparer.cs [8:15]
public bool Equals(X509Certificate x, X509Certificate y)
{
if (ReferenceEquals(x, y)) return true;
if (ReferenceEquals(x, null)) return false;
if (ReferenceEquals(y, null)) return false;
if (x.GetType() != y.GetType()) return false;
return x.SerialNumber.Equals(y.SerialNumber) && x.IssuerDN.Equivalent(y.IssuerDN);
}