C# Sharp Exercises: Insert a substring before the first occurrence of a string

C# Sharp String: Exercise-20 with Solution

Write a program in C# Sharp to insert a substring before the first occurrence of a string.

Sample Solution:-

C# Sharp Code:

using System;

public class Exercise20 
{
    public static void Main() 
    {
	
	 string str1;
	 string findstring;
	 string insertstring;
	 int i;


       Console.Write("\n\nInsert a substing before the first occurence of a string :\n");
       Console.Write("--------------------------------------------------------------\n");	

		Console.Write("Input the original string : ");
        str1 = Console.ReadLine();
		Console.Write("Input the string to be searched for : ");
        findstring = Console.ReadLine();  
		Console.Write("Input the string to be inserted : ");
        insertstring = Console.ReadLine(); 	   
        i=str1.IndexOf(findstring);  // locate the position of the first occurence of the string
        insertstring = " " + insertstring.Trim() + " ";
		str1 = str1.Insert(i, insertstring);
		Console.Write("The modified string is : {0}\n\n",str1);
	}
}

Sample Output:

Insert a substing before the first occurence of a string :                                                    
--------------------------------------------------------------                                                
Input the original string : The string is str                                                                 
Input the string to be searched for : string                                                                  
Input the string to be inserted : original                                                                    
The modified string is : The  original string is str  

Flowchart:

C# Sharp Code Editor:

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