Returns a value that represents a number of objects in the collection.
This method doesn't have any parameters.
builder.CreateFile("xlsx");
var oWorksheet = Api.GetActiveSheet();
var oRange = oWorksheet.GetRange("B1");
oRange.SetValue("This is just a sample text.");
var oCharacters = oRange.GetCharacters(23, 4);
var nCount = oCharacters.GetCount();
oWorksheet.GetRange("B3").SetValue("Number of characters: " + nCount);
builder.SaveFile("xlsx", "GetCount.xlsx");
builder.CloseFile();