Microsoft.VisualStudio.Project.ProjectNode.AddFileToMsBuild C# (CSharp) Method

        protected virtual ProjectElement AddFileToMsBuild(string file)
        {
            ProjectElement newItem;

            string itemPath = PackageUtilities.MakeRelativeIfRooted(file, this.BaseURI);
            Debug.Assert(!Path.IsPathRooted(itemPath), "Cannot add item with full path.");

            if (this.IsCodeFile(itemPath))
            {
                newItem = this.CreateMsBuildFileItem(itemPath, ProjectFileConstants.Compile);
                newItem.SetMetadata(ProjectFileConstants.SubType, ProjectFileAttributeValue.Code);
            }
            else if (this.IsEmbeddedResource(itemPath))
            {
                newItem = this.CreateMsBuildFileItem(itemPath, ProjectFileConstants.EmbeddedResource);
            }
            else
            {
                newItem = this.CreateMsBuildFileItem(itemPath, ProjectFileConstants.Content);
                newItem.SetMetadata(ProjectFileConstants.SubType, ProjectFileConstants.Content);
            }

            return newItem;
        }