Strings in C#

Introduction

This topic will demonstrate some of the common properties and methods of the String class:

• Property:
  • .Length
• Methods:
  • .ToUpper()
  • .ToLower()
  • .Substring(start) and .Substring(start, length)
  • .Contains(string)

Strings Demo

Create a C# Console application called StringsDemo.

Steps

1. Add the code comment block (replace authorname with your name, and modifieddate with the date you write this code):
   
2. Add the comment structure inside the static void Main(string[] args) method:
   
3. Start by adding the following code below the first comment line inside the Main() method:
   
   Note: There is a constant declared and initialized as you do not want to change the value of Name in this demo. Additionally, you can repalce the value of Name with your own name.
4. First, you will explore the .Length property of a string. Add the following code below code you enetered in step 3 above:
   
5. Next, you will explore the .ToUpper() method by adding the followig code:
   
   Note: You can replace the .ToUpper() with .ToLower() to see the value of Name in all lowercase letters.
6. In this next part, you will explore the .Substring() method. There are two overloads for this method. The first is extracting a portion inside the string by stating a start and a length of the portion of the string. Add the following code:
   
7. The other overload of the .Substring() method just uses a starting point and will select the portion of the string from there to the end of the string. Add the following code:
   
8. Lastly, you will explore the .Contains() method. This method returns a boolean (True or False) depending on whether the search string is contained in the given string. Add the following code:
   

9. Finally, add the Console.ReadLine(); code line below the code entered above.

   The output from this demo should look like:
   

   Note: It is important to note that the first character of a string is at position 0.
   

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