Selenium: Abort test

Using Selenium in Visual Studio. Using NUnit to sort my testcases.

I'm writing a testcase that compares two serialnumbers with a if statement like this:

[Test]
public void CompareVariables()
{
   if (string.Equals(serialNumberInfo, serialNumberReport))
      Console.WriteLine($"{serialNumberInfo} and {serialNumberReport} are a match! Proceed!");
   else
      Console.WriteLine($"{serialNumberInfo} and {serialNumberReport} don't match! Cancel test!");
      //method for aborting test missing!

I want to be able to abort the rest of the testsequence if the serialnumbers don't match.

Is there a "end/abort test" method or something similar I could put in else section?