How can you extract the first few characters of a string in c#?

In C#, you can use the Substring method to extract the first few characters of a string. Here is an example code:

string str = "Hello World";
int length = 5;
string result = str.Substring(0, length); //截取前5位
Console.WriteLine(result); //输出结果为 "Hello"

In the example above, we used the Substring method to extract the first 5 characters of the string “Hello World”. The first parameter is the starting index, and the second parameter is the length to be extracted.

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