To create a csv file we will use “StringBuilder” and “WriteAllText” functions. It use these functions we need to add two namespaces.

• System.Text (StringBuilder)
• System.IO (WriteAllText)

This is a very simple way to write a CSV (Comma separated value) file. You can use this file type to export and import data between applications.

I recommend you use this format in your export options when you are developing something.

private static void Csv(List<Element> elements)
{
	var csv = new StringBuilder();

	string head = "Field1,Field2,Field3";
	csv.AppendLine(head);

	foreach (var element in elements)
	{
		string line = element.field1 + ";" + element.field2 + ";" + element.field3;
		csv.AppendLine(line);
	}

	File.WriteAllText("data.csv", csv.ToString());
}

More information about CSV file: https://en.wikipedia.org/wiki/Comma-separated_values