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

        public virtual int OpenProjectCfg(string projectCfgCanonicalName, out IVsProjectCfg projectCfg)
        {
            if (projectCfgCanonicalName == null)
                throw new ArgumentNullException("projectCfgCanonicalName");
            if (string.IsNullOrEmpty(projectCfgCanonicalName))
                throw new ArgumentException("projectCfgCanonicalName cannot be null or empty");

            projectCfg = null;

            // Be robust in release
            if(projectCfgCanonicalName == null)
            {
                return VSConstants.E_INVALIDARG;
            }

            Debug.Assert(this._project != null && this._project.BuildProject != null);

            string[] configs = GetPropertiesConditionedOn(ProjectFileConstants.Configuration);
            string[] platforms = GetPlatformsFromProject();

            foreach (string config in configs)
            {
                foreach (string platform in platforms)
                {
                    if (string.Equals(string.Format("{0}|{1}", config, platform), projectCfgCanonicalName, StringComparison.OrdinalIgnoreCase))
                    {
                        projectCfg = this.GetProjectConfiguration(config, platform);
                        if (projectCfg != null)
                            return VSConstants.S_OK;
                        else
                            return VSConstants.E_FAIL;
                    }
                }
            }

            return VSConstants.E_INVALIDARG;
        }