//G.Sree Ramya

//Convert the given string into different Case

​

using System;

public class Program    

{

//for converting text to Snake_Case

    public static void ConvertToSnakeCase(string str) 

    { 

        string str1 = ""; 

        for (int i = 0; i < str.Length; i++) 

        {  

            if (str[i] == ' ') 

            {

                str1 = str1 + '_'; 

            }         

            else

            {

                str1 = str1 +  Char.ToLower(str[i]); 

            }

        }          

        Console.Write(str1); 

        }      

//for converting text to camelCase

    public static void ConvertToCamelCase(String str) 

    {

    int count= 0; 

        int n = str.Length; 

        char []ch = str.ToCharArray(); 

        int res_ind = 0; 

        for (int i = 0; i < n; i++)  

        { 

            if (ch[i] == ' ') 

            { 

                count++;               

                ch[i + 1] = char.ToUpper(ch[i + 1]); 

                continue; 

            } 

            else

            {

                ch[res_ind++] = ch[i];  

            }

         }

            for(int i = 0; i < n - count; i++) 

            {

                Console.Write(ch[i]); 

            }

    } 

//for converting to SnakeCase if entered string is in CamelCase format

    public static string ToSnakeCase(string str)

        {

            string myString = "";

            for (int i = 0; i < str.Length; i++)

            {   

                if(Char.IsUpper(str[i]))

                {

                    myString += "_" + Char.ToLower(str[i]);

                }

                else

                    myString += str[i];

            }

            return myString;

        }

//for converting to CamelCase if entered string is in SankeCase format

        public static string ToCamelCase(string str)

        {

            string result = "";

            bool mustBeUpper = false;

            for (int i = 0; i < str.Length; i++)

            {

                if (str[i] == '_')

                {

                    mustBeUpper = true;

                }

                else

                {

                    if (mustBeUpper)

                    {

                      result += Char.ToUpper(str[i]);

                      mustBeUpper = false;

                    }

                    else

                    {

                        result += str[i];

                    }

                }

            }

            return result;

        }

​

​

  public static void Main()

  {

                string myString;      

                string str;

                Console.WriteLine("Enter a string ");

                str = Console.ReadLine();   

                Console.WriteLine("camelCase format:");

                ConvertToCamelCase(str);

                Console.WriteLine();

                Console.WriteLine("snake_case format:");

                ConvertToSnakeCase(str);

                 Console.WriteLine();

                Console.WriteLine("Enter a string in the form of either SnakeCase or CamelCase");

                myString = Console.ReadLine();

                if(myString==ToSnakeCase(myString))

                {

                    Console.WriteLine("camelCase format  of entered snake_case string:");

                    Console.WriteLine(ToCamelCase(myString));

                }

                if(myString==ToCamelCase(myString))

                {

                    Console.WriteLine("snake_case format of entered camelCase string:");

                    Console.WriteLine(ToSnakeCase(myString));

                }

  }

}

​

​