public async void LoadComboBoxes(object e) { var certificationTypes = await GetData.CertificationQueryAsync(); foreach (CertificationModel certification in certificationTypes) { CertificationTypes.Add(certification); } var restrictionTypes = await GetData.RestrictionQueryAsync(); foreach (RestrictionModel restrictionType in restrictionTypes) { RestrictionTypes.Add(restrictionType); } var departments = await GetData.DepartmentQueryAsync(); foreach (DepartmentModel department in departments) { Departments.Add(department); } var jobTitles = await GetData.JobTitleQueryAsync(); foreach (JobTitleModel jobTitle in jobTitles) { JobTitles.Add(jobTitle); } }