CryptVerifySignature

[DllImport("Advapi32.dll", SetLastError = true)][return: MarshalAs(UnmanagedType.Bool)]
public static extern bool CryptVerifySignature(
   IntPtr hHash,
   byte[] pbSignature,
   uint dwSigLen,
   IntPtr hPubKey,
   string sDescription,
   uint dwFlags
);

Microsoft documentation: Link