vidual studio中用c#写相关语句

Question

求三个数中的最大值：
protected void Button1_Click(object sender, EventArgs e)
{ double x,maxnum;
protect double MaxValue(double num1,double num2,double num3)
{ double num1=double .Parse (TextNumber1.Text );
double num2=double. Parse (TextNumber2.Text );
double num3=double. Parse (TextNumber3.Text );
return x;
}
maxnum=MaxValue(num1,num2,num3);
lblResult.Text=Convert .ToString(maxnum);

    }

请各位大神帮忙看看哪错了，谢了!

Answer 1

方法里面没有比较三个数，而且return的x为null