What are the methods for extracting substrings in C#?

The following methods can be used in C# to extract substrings:

1. Utilize the Substring() method:

string originalString = "Hello, World!";
string subString = originalString.Substring(7, 5); // 从索引为7开始，截取长度为5的子字符串

1. Combine the Substring() method with the Length property:

string originalString = "Hello, World!";
string subString = originalString.Substring(7, originalString.Length - 7); // 从索引为7开始，截取到字符串的末尾

1. Utilizing the Remove() method of the String class:

string originalString = "Hello, World!";
string subString = originalString.Remove(5); // 从索引为5开始截取到字符串的末尾

1. Combine the Remove() method of the String class with the Length property.

string originalString = "Hello, World!";
string subString = originalString.Remove(0, 7); // 从索引为0开始截取长度为7的子字符串

1. Utilize the Substring() and IndexOf() methods:

string originalString = "Hello, World!";
string subString = originalString.Substring(originalString.IndexOf(',') + 2); // 从逗号后的第二个字符开始截取到字符串的末尾

These methods can be used to extract different parts of a string based on specific needs.

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