Problem

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String addition

Theory Click to read/hide

Strings can be added together using the "+" sign. This operation is called string concatenation or concatenation
For example, 

string s = "Hi,";
string s1 = "world";
Console.WriteLine(s + s1);
The screen will display the phrase "Hello world" (without quotes).
 

Problem

The first line is the username.
Display:
1) in the first line - a greeting to the user in the form "Hello, name!" (without quotes)
2) in the second line - print the username 10 times separated by a space.