6 Ways to Insert a New Line in C# and ASP.NET
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Fady Soliman

6 Different Ways to Add New Lines in C# and ASP.NET

Dot Net C# is one of the greatest managed programming languages. A managed programming language interprets or builds your code and transforms it into another executable format to be executed on your operating system.

For example, in .Net, when you write some code and try to build it, the Just-in-Time JIT compilation compiles your code and transforms it to machine instructions, which then will be executed by Common Language Runtime CLR. 

For more information about CLR, see Common Language Runtime.

In this post, we will discuss 6 different ways to insert a new line in C# and test our code on a console application, and we will emphasize the relationship between one or more of these ways with what we discussed earlier about CLR.

The 6 ways to insert new lines in C# are as follows:

  1. Using parameter-less Console.WriteLine() to add a new line.
  2. Injecting new lines within the same string.
  3. Using Environment.NewLine.
  4. Using the ASCII literal of a new line.
  5. Using \r\n to insert a new line.
  6. Inserting new lines in ASP.NET for an existing string.

Using Parameter-less Console.WriteLine() to Add a New Line

The easiest way to inject a new line in a console application is to use a parameter-less Console.WriteLine(). For example:

<br>Console.WriteLine("This is a line");<br>Console.WriteLine();<br>Console.WriteLine("This is another line");<br>

As mentioned in Microsoft's Documentation, running a Console.WriteLine() without any parameters translates to a line terminator as shown in the next screenshot.

New line using parameterless Console.WriteLine()

So as shown above, a parameter-less Console.WriteLine() defaults to one line break between two lines. You can also change this default preset by any spacing you require. For example, you can change the Console.WriteLine() to enter two lines instead of one. This can be handled by the following code example.

The above code, will let every Console.WriteLine() call to insert 2 lines. So if you passed a string to any Console.WriteLine(), a new line will be added in addition to the current input string. Likewise, the parameter-less Console.WriteLine() will actually enter two lines instead of just one.

The output of the above code will look like this:

Changing the new line default

Notice that, there is one line entered after the first Console.WriteLine(), then two blank lines for the second Console.WriteLine(), then one blank line after the third call.

Injecting New Lines within the Same String

The second way to insert a new line in a string is to place \n within your string. For example:

The above code will run as shown in the next screenshot:

Injecting \n as a new line in the same string

As clearly noticed, the \n could successfully insert a new line inside the same string.

Using Environment.NewLine

Another way to add a new line in a string is using Environment.NewLine. For example:

The above code will produce the same result as the previous screenshot.

Using the ASCII Literal of a New Line

This method is similar to the \n. But instead, you can use the ASCII literal that represents a new line. For example:

This new line ASCII literal \x0A will also insert a new line in the string above.

Using \r\n to Insert a New Line

You can also inject \r\n in a string to insert a new line. For example:

The above code will successfully insert a new line using \r\n. But what's the difference between \r\n and \n?

\n represents a new line, while \r represents a carriage return, which means the cursor will be moved to the very far left position. For more information, see Difference between \r and \r\n.

Inserting New Lines in ASP.NET for an Existing String

Line breaks in HTML or ASP.NET is represented by the < br /> tag. In some cases, you will need to convert an existing string that contains new lines to a valid HTML code that includes < br /> tags. To convert a string's new lines to HTML line breaks you can use the following method that leverages regular expressions.

The above method is designed to be an extension method. Include the method in a separate file, then include it in your code through a using statement then call the method as follows:

You can test the above regular expression on this link.

If you have any questions or want to improve any of the above methods, feel free to drop me a comment.
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About The Author

Fady Soliman

An experienced, resourceful and highly motivated IT professional, with a proven record of success in both Stack Development and Software Architecture. Possesses a wealth of transferable skills, including outstanding interpersonal, problem solving and staff management abilities. A capable organizer, quick to grasp – and make good use of – new ideas and information, and reliable and conscientious in all he takes on.

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