C# Substring 和 String.join 0010

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String Contains String:

using System;namespace StringApplication1{    class Program    {        static void Main(string[] args)        {            string str = "This is test";            if (str.Contains("test"))            {                Console.WriteLine("The sequence 'test' is found");            }            Console.ReadKey();        }    }}

output:
The sequence ‘test’ is found

using System;namespace StringApplication1{    class Program    {        static void Main(string[] args)        {            string str = "Last night I dreamt of shiqi Li";            Console.WriteLine(str);            string substr = str.Substring(23);            Console.WriteLine(substr);            Console.ReadKey();        }    }}

output:
Last night I dreamt of shiqi Li
shiqi Li

using System;namespace StringApplication1{    class Program    {        static void Main(string[] args)        {            string[] strarry = new string[] {"I",            "love",           "you"};            string str = String.Join("\n",strarry);            Console.WriteLine(str);            Console.ReadKey();        }    }}

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