We use string.format to format the data written to the console using the console.write or console.writeline commands. However, it isn’t indented well to make it readable. C# allows you to bridge this gap by supporting the addition of spaces and thus providing the formatted and indented output.

for (int counter=0 ; counter  {Console.WriteLine(string.Format("Collection Key: {0,-5} Value: {1,5}"), collection[counter].key, collection[counter].value);}

As you already know, the numbers 0 and 1 are used to position the value of the variables in the formatted response string. The numbers -5 and 5 allow you to left align and right align the text within 5 spaces.