Microsoft.VisualStudio.Project.NestedProjectNode.SaveNestedProjectItemInProjectFile C# (CSharp) Method

        protected virtual void SaveNestedProjectItemInProjectFile(string newFileName)
        {
            string existingInclude = this.ItemNode.Item.EvaluatedInclude;
            string existingRelativePath = Path.GetDirectoryName(existingInclude);
            string newRelativePath = Path.Combine(existingRelativePath, newFileName);
            this.ItemNode.Rename(newRelativePath);
        }