Project project = new Project("New Project.mpp");

// Add resource and set some properties
Resource resource = project.Resources.Add("Rsc");
resource.Set(Rsc.StandardRate, 30);
resource.Set(Rsc.OvertimeRate, 45);
resource.Set(Rsc.Group, "Workgroup1");

project.Save("UpdateResourceData_out.mpp", SaveFileFormat.MPP);