Microsoft.VisualStudio.R.Package.ProjectSystem.PropertyPages.PropertyPageControl.Apply C# (CSharp) Method

        public async Task<int> Apply() {
            int result = VSConstants.S_OK;

            if (IsDirty) {
                result = await OnApply();
                if (result == VSConstants.S_OK) {
                    IsDirty = false;
                }
            }

            return result;
        }

 protected async override Task <int> OnApply()
 {
     return(await _control.Apply());
 }