ToTitleCase Method

TextInfo.ToTitleCase Method (String)


Converts the specified string to title case (except for words that are entirely in uppercase, which are considered to be acronyms).

Namespace:   System.Globalization
Assembly:  mscorlib (in mscorlib.dll)

public string ToTitleCase(
	string str


Type: System.String

The string to convert to title case.

Return Value

Type: System.String

The specified string converted to title case.

Exception Condition

str is null.

Generally, title casing converts the first character of a word to uppercase and the rest of the characters to lowercase. However, this method does not currently provide proper casing to convert a word that is entirely uppercase, such as an acronym. The following table shows the way the method renders several strings.



Expected result

Actual result

war and peace


War and Peace

War And Peace

Per anhalter durch die Galaxis


Per Anhalter durch die Galaxis

Per Anhalter Durch Die Galaxis

les naufragés d'ythaq


Les Naufragés d'Ythaq

Les Naufragés D'ythaq

As illustrated above, the ToTitleCase method provides an arbitrary casing behavior which is not necessarily linguistically correct. A linguistically correct solution would require additional rules, and the current algorithm is somewhat simpler and faster. We reserve the right to make this API slower in the future.

The current implementation of the ToTitleCase method yields an output string that is the same length as the input string. However, this behavior is not guaranteed and could change in a future implementation.

The following example changes the casing of a string based on the English (United States) culture, with the culture name en-US.

using System;
using System.Globalization;

public class SamplesTextInfo  {

   public static void Main()  {

      // Defines the string with mixed casing.
      string myString = "wAr aNd pEaCe";

      // Creates a TextInfo based on the "en-US" culture.
      TextInfo myTI = new CultureInfo("en-US",false).TextInfo;

      // Changes a string to lowercase.
      Console.WriteLine( "\"{0}\" to lowercase: {1}", myString, myTI.ToLower( myString ) );

      // Changes a string to uppercase.
      Console.WriteLine( "\"{0}\" to uppercase: {1}", myString, myTI.ToUpper( myString ) );

      // Changes a string to titlecase.
      Console.WriteLine( "\"{0}\" to titlecase: {1}", myString, myTI.ToTitleCase( myString ) );



This code produces the following output.

"wAr aNd pEaCe" to lowercase: war and peace
"wAr aNd pEaCe" to uppercase: WAR AND PEACE
"wAr aNd pEaCe" to titlecase: War And Peace


The following example passes each string in an array to the ToTitleCase method. The strings include proper title strings as well as acronyms. The strings are converted to title case by using the conventions of the en-US culture.

using System;
using System.Globalization;

public class Example
   public static void Main()
      string[] values = { "a tale of two cities", "gROWL to the rescue",
                          "inside the US government", "sports and MLB baseball",
                          "The Return of Sherlock Holmes", "UNICEF and children"};

      TextInfo ti = CultureInfo.CurrentCulture.TextInfo;
      foreach (var value in values)
         Console.WriteLine("{0} --> {1}", value, ti.ToTitleCase(value));
// The example displays the following output:
//    a tale of two cities --> A Tale Of Two Cities
//    gROWL to the rescue --> Growl To The Rescue
//    inside the US government --> Inside The US Government
//    sports and MLB baseball --> Sports And MLB Baseball
//    The Return of Sherlock Holmes --> The Return Of Sherlock Holmes
//    UNICEF and children --> UNICEF And Children

.NET Framework
Available since 1.1
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