How can I disable certificate validation in a C# SOAP client?

You can disable certificate validation in a C# SOAP client by modifying the `ServicePointManager.ServerCertificateValidationCallback` delegate. Set it to a method that always returns `true`, effectively ignoring certificate errors. Example: `ServicePointManager.ServerCertificateValidationCallback += (sender, certificate, chain, policyErrors) => true;`. **Important:** This is generally not recommended for production environments due to security risks. It should only be used for testing or in controlled environments where you understand the implications.