<?xml version="1.0" encoding="us-ascii"?>
<ErrorDocumentation xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
  <ErrorName>CS1745</ErrorName>
  <Examples>
    <string>// CS1745: Cannot specify `System.Runtime.InteropServices.Optional' attribute on optional parameter `u'
// Line: 8
// Compiler options: -langversion:future

using System.Runtime.InteropServices;

public class C
{
	public static void Test ([Optional] int u = 2)
	{
	}
}
</string>
  </Examples>
</ErrorDocumentation>