Uppercasing and Lowercasing

You can easily produce a version of a string where all the characters are uppercase or all the characters are lowercase.

To produce a string in either uppercase or lowercase form:

1. Declare a new string variable.

2. Type = str.ToUpper(); or = str.ToLower() accordingly , where str is a variable holding the original string ( Figure 4.55 ).

   Figure 4.55 The ToUpper function creates a new string object from the original where all characters are in uppercase.

    string msg= "When are you going to be done?";  string screamMsg = msg.ToUpper();  /* outputs: WHEN ARE YOU GOING TO BE DONE? */ 

Tip

• The ToUpper and ToLower functions don't change the original string. They produce new strings (and therefore new string buffers) with the characters' case modified.