Compiler Warning (level 1) CS1581

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Invalid return type in XML comment cref attribute

When attempting to reference a method, the compiler detected an error due to an invalid return type.

Example

The following sample generates CS1581:

// CS1581.cs
// compile with: /W:1 /doc:x.xml

/// <summary>help text</summary>
public class MyClass
{
    /// <summary>help text</summary>
    public static void Main()
    {
    }

    /// <summary>help text</summary>
    public static explicit operator int(MyClass f)
    {
        return 0;
    }
}

/// <seealso cref="MyClass.explicit operator intt(MyClass)"/>  // CS1581
// try the following line instead
// /// <seealso cref="MyClass.explicit operator int(MyClass)"/>
public class MyClass2
{
}