// For complete examples and data files, please go to https://github.com/aspose-cells/Aspose.Cells-for-.NET
// The path to the documents directory.
string dataDir = RunExamples.GetDataDir(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);

// Create a workbook.
Workbook wb = new Workbook();

// Access first worksheet.
Worksheet ws = wb.Worksheets[0];

// Add text box inside the sheet.
ws.Shapes.AddTextBox(2, 0, 2, 0, 80, 400);

// Access first shape which is a text box and set is text.
Shape shape = ws.Shapes[0];
shape.Text = "Sign up for your free phone number.\nCall and text online for free.\nCall your friends and family.";

// Acccess the first paragraph and set its horizontal alignment to left.
TextParagraph p = shape.TextBody.TextParagraphs[0];
p.AlignmentType = TextAlignmentType.Left;

// Acccess the second paragraph and set its horizontal alignment to center.
p = shape.TextBody.TextParagraphs[1];
p.AlignmentType = TextAlignmentType.Center;

// Acccess the third paragraph and set its horizontal alignment to right.
p = shape.TextBody.TextParagraphs[2];
p.AlignmentType = TextAlignmentType.Right;

// Save the workbook in xlsx format.
wb.Save(dataDir + "output_out.xlsx", SaveFormat.Xlsx);