ListIndentation

public TxtListIndentation ListIndentation { get; }

Document doc = new Document();
DocumentBuilder builder = new DocumentBuilder(doc);

// Create a list with three levels of indentation.
builder.ListFormat.ApplyNumberDefault();
builder.Writeln("Item 1");
builder.ListFormat.ListIndent();
builder.Writeln("Item 2");
builder.ListFormat.ListIndent(); 
builder.Write("Item 3");

// Create a "TxtSaveOptions" object, which we can pass to the document's "Save" method
// to modify how we save the document to plaintext.
TxtSaveOptions txtSaveOptions = new TxtSaveOptions();

// Set the "Character" property to assign a character to use
// for padding that simulates list indentation in plaintext.
txtSaveOptions.ListIndentation.Character = ' ';

// Set the "Count" property to specify the number of times
// to place the padding character for each list indent level.
txtSaveOptions.ListIndentation.Count = 3;

doc.Save(ArtifactsDir + "TxtSaveOptions.TxtListIndentation.txt", txtSaveOptions);

string docText = File.ReadAllText(ArtifactsDir + "TxtSaveOptions.TxtListIndentation.txt");

Assert.AreEqual("1. Item 1\r\n" +
                "   a. Item 2\r\n" +
                "      i. Item 3\r\n", docText);