你好clever101，

请尝试以下代码，使用Microsoft.Build.Evaluation.Project将文件夹添加到项目中。

 var pro = new Microsoft.Build.Evaluation.Project（" ProjectPath"）; 
 pro.AddItem（" Folder"，" Folder Path"）; 
 pro.Save（）; 

祝你好运，

张龙

        I want to implement  add a virtual folder on a existing vc project. My code as follows:

var item = null;
var folderName = "MyFolder";

try {
   // attempt to retrieve the existing folder as a project item
   item = vcProject.ProjectItems.Item(folderName);
} catch (e) {
   // something prevented us from getting the folder
   item = null;
}

if (item == null) {
   item = vcProject.ProjectItems.AddFolder(folderName);
}

       a error occurred, the errpr tip is : Object doesn't support this action. it means vcProject.ProjectItems doesn't support AddFolder this method.

My environment: VisualStudio 2013, Win 7 + sp1 64 bit

前无古人，后无来者

Hi clever101,

Please try the following code, which using Microsoft.Build.Evaluation.Project to add folder into project.

var pro = new Microsoft.Build.Evaluation.Project("ProjectPath");
pro.AddItem("Folder", "Folder Path");
pro.Save();

Best regards,

Zhanglong