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

        protected virtual void SaveMSBuildProjectFileAs(string newFileName)
        {
            Debug.Assert(!String.IsNullOrEmpty(newFileName), "Cannot save project file for an empty or null file name");

            this.buildProject.FullPath = newFileName;

            this.filename = newFileName;

            string newFileNameWithoutExtension = Path.GetFileNameWithoutExtension(newFileName);

            // Refresh solution explorer
            this.SetProjectProperty(ProjectFileConstants.Name, newFileNameWithoutExtension);

            // Saves the project file on disk.
            this.buildProject.Save(newFileName);
        }