索引结构在C＃8.0中引入。它表示可用于索引集合或序列的类型，并且可以从头开始或从头开始。您可以在Index结构提供的Start Property的帮助下找到索引，该索引指向指定集合或序列的第一个元素。
句法：
public static property Index Start { Index get(); };范例1：
// C# program to illustrate the
// concept of the start index
using System;
namespace example {
class GFG {
// Main Method
static void Main(string[] args)
{
// Creating new indexes
// Using Index() constructor
var in1 = new Index(1, true);
var in2 = new Index(3, false);
// Get the start index
var res1 = Index.Start;
// Displaying the index
Console.WriteLine("Index: {0}", in1);
Console.WriteLine("Index: {0}", in2);
Console.WriteLine("Start Index: {0}", res1);
}
}
}
输出：
Index: ^1
Index: 3
Start Index: 0
范例2：
// C# program to illustrate the
// concept of the start index
using System;
namespace example {
class GFG {
// Main Method
static void Main(string[] args)
{
// Creating and initializing an array
string[] greetings = new string[] {"Hello", "Hola", "Namaste",
"Bonjour", "Ohayo", "Ahnyounghaseyo"};
// Get the end index
var res = Index.Start;
// Checking the given index
// is the start index or not
if (res.Equals(0) == true) {
Console.WriteLine("The given index is start index"+
" and the element is " + greetings[res]);
}
else {
Console.WriteLine("The given index is not the start index ");
}
}
}
}
输出：
The given index is start index and the element is Hello