c#文件类型

除了。txt，还有什么地方可以用c#插入数据呢?

string file = GenerarPath(Environment.SpecialFolder.MyDocuments, "Pascal Triangle.txt");
var tw = new StreamWriter(file);
Console.WriteLine("'t't Pascal Triangle in C#");
Console.WriteLine("'t________________________________________");
Console.Write("'nNumber of Rows: ");
int number = int.Parse(Console.ReadLine());
int x = number * 2;
for (int i = 0; i <= number; ++i, x -= 2)
{
    for (int s = 0; s <= x; ++s)
         tw.Write(" ");
    for (int k = 0; k <= i; ++k)
         //Console.Write(String.Format("{0,4:D}", formula(i, k)));
    tw.Write(String.Format("{0,4:D}",pascal(i,k)));//formula(i, k)));
    tw.WriteLine();
}
tw.Close();
Console.WriteLine("Finished");
Console.ReadKey();

谢谢