Microsoft.VisualStudio.Project.ConfigProvider.RenameCfgsOfCfgName C# (CSharp) Method

        public virtual int RenameCfgsOfCfgName(string old, string newname)
        {
            if (old == null)
                throw new ArgumentNullException("old");
            if (newname == null)
                throw new ArgumentNullException("newname");
            if (string.IsNullOrEmpty(old))
                throw new ArgumentException("old cannot be null or empty");
            if (string.IsNullOrEmpty(newname))
                throw new ArgumentException("newname cannot be null or empty");

            // We need to QE/QS the project file
            if (!this.ProjectManager.QueryEditProjectFile(false))
            {
                throw Marshal.GetExceptionForHR(VSConstants.OLE_E_PROMPTSAVECANCELLED);
            }

            foreach (MSBuild.Project project in GetBuildProjects(true))
            {
                int hr = RenameConfiguration(project, old, newname);
                if (ErrorHandler.Failed(hr))
                    return hr;
            }

            string[] platforms = GetPlatformsFromProject();
            foreach (var platform in platforms)
            {
                string oldKey = string.Format("{0}|{1}", old, platform);
                string newKey = string.Format("{0}|{1}", newname, platform);

                // Update the name in our configuration list
                ProjectConfig configuration;
                if (configurationsList.TryGetValue(oldKey, out configuration))
                {
                    configurationsList.Remove(oldKey);
                    configurationsList.Add(newKey, configuration);
                    // notify the configuration of its new name
                    configuration.ConfigName = newname;
                }
            }

            NotifyOnCfgNameRenamed(old, newname);

            return VSConstants.S_OK;
        }