public LoadFeatureSheetsViewModel()
{
Filter = "Excel Spreadsheets (.xlsx)|*.xlsx|All Files (*.*)|*.*";
FilterIndex = 1;
Sheet1Path = "C:PATHFatigue Calculation Results.xlsx";
FileStream stream = new FileStream("C:PATHFatigue Calculation Results.xlsx", FileMode.Open, FileAccess.Read, FileShare.ReadWrite);
Sheet1Source = new SpreadsheetDocumentSource(stream, DocumentFormat.OpenXml);
Title = "Select Feature Sheet";
}