using System;
class Triangle
{
private int a;
private int b;
private int c;
public Triangle(int va ,int vb ,int vc )
{
a= va ;
b = vb;
c = vc;
}
static void Main()
{

Triangle tr= new Triangle(20,20,20);
Console.WriteLine("{0},{1},{2}",tr.va,tr.vb,tr.vc);

}

}

这段代码哪里出错了 请问大家

using System;
class Triangle
{
private int a;
private int b;
private int c;
public Triangle(int va ,int vb ,int vc )
{
a= va ;
b = vb;
c = vc;
}
static void Main()
{

Triangle tr= new Triangle(20,20,20);
Console.WriteLine("{0},{1},{2}",tr.a,tr.b,tr.c);

}

}