Create a C# program named ShowHostNameOfIP.cs to satisfy the following:

1. User can run it on command line with no initial input data.

2. When it runs, it prompts "Enter an IP address (e.g., 131.247.2.211): " to let user enter an IP address at command line. We assume this program accepts only valid and existing IP address, meaning, no need to test it with a random IP or "garbage" input.

3. It reads the given IP address and prints on screen a message "Host name of x.x.x.x is: hhhhhh", where 'x.x.x.x' is the IP address user entered and 'hhhhh' is what your program finds the host name of the IP.