c#菜鸟问题,大家帮忙来看看啊

Question

using System;
using StudentGrade;
struct StudentGrade
{
public byte s1,s2,s3,s4;
}
class Test
{
public static void Main()
{
StudentGrade myStudentGrade;
myStudentGrade.s1=92;
myStudentGrade.s2=88;
myStudentGrade.s3=81;
myStudentGrade.s4=100;
Console.Write("{0}.{1}",myStudent.s1,myStudent.s2);
Console.Write("{0}.{1}",myStudent.s3,myStudent.s4); }
} 
  
大家都来帮我看看哈
.NET提示语言是帮我看看哪不行
显示using命名空间指令只能应用于命名空间 
  
等候佳音

Answer 1

using System;
struct StudentGrade
{
public byte s1,s2,s3,s4;
}
class Test
{
public static void Main()
{
StudentGrade myStudentGrade;
myStudentGrade.s1=92;
myStudentGrade.s2=88;
myStudentGrade.s3=81;
myStudentGrade.s4=100;
Console.WriteLine("{0}.{1}",myStudentGrade.s1,myStudentGrade.s2);
Console.Write("{0}.{1}",myStudentGrade.s3,myStudentGrade.s4); }
}

Answer 2

using StudentGrade;不用引用的。

Answer 3

不需要引用,StudentGrade不是NAMESPACE,只是一个结构体名称

Answer 4

using是用来引用命名空间和类的，不能引用结构。

Answer 5

Console.WriteLine("{0}.{1}",myStudentGrade.s1,myStudentGrade.s2);
Console.Write("{0}.{1}",myStudentGrade.s3,myStudentGrade.s4);
大家能告诉我Console.WriteLine和Console.Write的区别吗?