1 week ago, when I hit F12 (Edit.GoToDefinition command) in visual studio, it opened me the class definition in a metadata file. Now when I hit F12, visual studio send me to the class definition in the object browser.
Do you know how to modify this behavior ?
It's possible you are using a language which does not support this behavior. The default behavior for most languages and Edit.GoToDefinition is to bring up the object browser as you've indicated. This is true for VB.Net, C++, etc ... The only language which supports the generation of MetaData is C#.
Which language are you using?