You assume wrongly, seven lines comprise a complete working example that
runs in Eclipse :-)

Well, since you seem so interested, I'll post it here, then you can have
the satisfaction of telling me where I am going wrong :-).

I didn't post it earlier in order to avoid discouraging newbies from
thinking for themselves a little.

Any conversion of C# to Java could be done at many levels, statement by
statement would be one. Producing the same output would be another.
Somewhere in between there are a range of conversions which, to varying
degrees, employ Java idioms or features in place of C# idioms or features.

Recall, in my original post I said ...

"What purpose is served by MyClass that couldn't be better achieved by
using String[] in place of MyClass in MyClient below?"

Well I chose a level of conversion which assumed that there was no real
need for MyClass in order to produce the same output. Maybe MyClass is
unnecessary in C# also but was included for ulterior reasons (e.g. to
demonstrate some aspect of C# programming) in which case my conversion
could be regarded as "incorrect". The OP doesn't provide enough
information to decide.

So, excluding blank lines and comments, here are the 7 lines I came up
with ...
-----------------------------------------------------------------------
class MyClient {
    public static void main(String[] args) {
        String[] mc = {"Rajesh","A3-126","Snehadara","Irla","Mumbai"};
        System.out.printf("%s,%s,%s,%s,%s,%s",
                "{0},{1},{2},{3},{4}",mc[0],mc[1],mc[2],mc[3],mc[4]);
    }
}
-----------------------------------------------------------------------

There you are, elementary stuff, nothing clever or surprising. A bit
shorter than the OP's C# original even accounting for the different
conventions for opening brackets.

Note that I did not, and am not, claiming that an equivalent program
couldn't be written in seven or fewer lines in C#. I merely noted that
my conversion produced 7 lines of Java.

-----------------------------------------------------------------------
using System;
using System.Collections;

class MyClass
{
 private string []data = new string[5];
 public string this [int index]
 {
  get
  {
   return data[index];
  }
  set
  {
   data[index] = value;
  }
 }
}

class MyClient
{
 public static void Main()
 {
  MyClass mc = new MyClass();
  mc[0] = "Rajesh";
  mc[1] = "A3-126";
  mc[2] = "Snehadara";
  mc[3] = "Irla";
  mc[4] = "Mumbai";

Console.WriteLine("{0},{1},{2},{3},{4}",mc[0],mc[1],mc[2],mc[3],mc[4]);
 }
}
------------------------------------------------------------------------