.NET

[#1]

The Doc.CloseAndDiscard() method on documents returns message of ' not a member of 'Autodesk.AutoCAD.ApplicationServices.Document'. 

How do we close a dwg file in AutoCAD 2013?

Thanks

[#2 · Accepted solution]

DocumentExtension.CloseAndDiscard

P.S.: Also read ObjectARX for AutoCAD 2013 Docs: Managed Class Reference -> Migration Guide->.NET Migration Guide

[#3]

Works great, thanks.

[#4]

more clearly, it's DocumentExtension.CloseAndDiscard(doc)

just in case anyone would expect it to be an extension method, like i did

[#5]

It is a extension method

public static void CloseAndDiscard(this Document doc)
{
    CloseInternal(doc, true, null);
}

[#6]

I checked it and you're right, but I am using VB.net. And there it isn't an extension method.

Taken from MSDN:

Notice that the extension method definition is marked with the extension attribute <Extension()>. Marking the module in which the method is defined is optional, but each extension method must be marked. System.Runtime.CompilerServices must be imported in order to access the extension attribute.

Extension methods can be declared only within modules.

[#7]

With C# you import the namespace and VB you import the module, but it still is a extension method.

[#8]

I am importing 

Imports Autodesk.AutoCAD.ApplicationServices.DocumentExtension

which is a class. I couldn't find the module I am supposed to import in VB. Do you know where I can find it?

[#9]

In AutoCAD 2013 class Autodesk.AutoCAD.ApplicationServices.DocumentExtension is in acmgd.dll

[#10]

I know that, Alexander. I was asking about the module for VB.