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CompareInfo.LastIndexOf Method (String, String, Int32)

Searches for the specified substring and returns the zero-based index of the last occurrence within the section of the source string that extends from the beginning of the string to the specified index.

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

public virtual int LastIndexOf (
	string source,
	string value,
	int startIndex
)
public int LastIndexOf (
	String source, 
	String value, 
	int startIndex
)
public function LastIndexOf (
	source : String, 
	value : String, 
	startIndex : int
) : int
Not applicable.

Parameters

source

The string to search.

value

The string to locate within source.

startIndex

The zero-based starting index of the backward search.

Return Value

The zero-based index of the last occurrence of value within the section of source that extends from the beginning of source to startIndex, if found; otherwise, -1.

Exception typeCondition

ArgumentNullException

source is a null reference (Nothing in Visual Basic).

-or-

value is a null reference (Nothing in Visual Basic).

ArgumentOutOfRangeException

startIndex is outside the range of valid indexes for source.

The source string is searched backward starting at startIndex and ending at the beginning of the string.

This overload performs a culture-sensitive search. A Unicode value representing a precomposed character, such as the ligature "Æ" (U+00C6), might be considered equivalent to any occurrence of the character's components in the correct sequence, such as "AE" (U+0041, U+0045), depending on the culture. To perform an ordinal (culture-insensitive) search, where the Unicode values are compared, the application should use one of the overloads that accepts a CompareOptions value as a parameter and use the Ordinal value.

The following code example determines the indexes of the first and last occurrences of a character or a substring within a portion of a string. Note that IndexOf and LastIndexOf are searching in different portions of the string, even with the same startIndex parameter.

using System;
using System.Globalization;

public class SamplesCompareInfo  {

   public static void Main()  {

      // Creates CompareInfo for the InvariantCulture.
      CompareInfo myComp = CultureInfo.InvariantCulture.CompareInfo;

      // iS is the starting index of the substring.
      int iS = 20;
      // myT1 is the string used for padding.
      String myT1;

      // Searches for the ligature Æ.
      String myStr = "Is AE or ae the same as Æ or æ?";
      Console.WriteLine();

      myT1 = new String( '-', iS );
      Console.WriteLine( "IndexOf( String, *, {0}, * )", iS );
      Console.WriteLine( "Original      : {0}", myStr );
      Console.WriteLine( "No options    : {0}{1}", myT1, myStr.Substring( iS ) );
      PrintMarker( "           AE : ", myComp.IndexOf( myStr, "AE", iS ), -1 );
      PrintMarker( "           ae : ", myComp.IndexOf( myStr, "ae", iS ), -1 );
      PrintMarker( "            Æ : ", myComp.IndexOf( myStr, 'Æ', iS ), -1 );
      PrintMarker( "            æ : ", myComp.IndexOf( myStr, 'æ', iS ), -1 );
      Console.WriteLine( "Ordinal       : {0}{1}", myT1, myStr.Substring( iS ) );
      PrintMarker( "           AE : ", myComp.IndexOf( myStr, "AE", iS, CompareOptions.Ordinal ), -1 );
      PrintMarker( "           ae : ", myComp.IndexOf( myStr, "ae", iS, CompareOptions.Ordinal ), -1 );
      PrintMarker( "            Æ : ", myComp.IndexOf( myStr, 'Æ', iS, CompareOptions.Ordinal ), -1 );
      PrintMarker( "            æ : ", myComp.IndexOf( myStr, 'æ', iS, CompareOptions.Ordinal ), -1 );
      Console.WriteLine( "IgnoreCase    : {0}{1}", myT1, myStr.Substring( iS ) );
      PrintMarker( "           AE : ", myComp.IndexOf( myStr, "AE", iS, CompareOptions.IgnoreCase ), -1 );
      PrintMarker( "           ae : ", myComp.IndexOf( myStr, "ae", iS, CompareOptions.IgnoreCase ), -1 );
      PrintMarker( "            Æ : ", myComp.IndexOf( myStr, 'Æ', iS, CompareOptions.IgnoreCase ), -1 );
      PrintMarker( "            æ : ", myComp.IndexOf( myStr, 'æ', iS, CompareOptions.IgnoreCase ), -1 );

      myT1 = new String( '-', myStr.Length - iS - 1 );
      Console.WriteLine( "LastIndexOf( String, *, {0}, * )", iS );
      Console.WriteLine( "Original      : {0}", myStr );
      Console.WriteLine( "No options    : {0}{1}", myStr.Substring( 0, iS + 1 ), myT1 );
      PrintMarker( "           AE : ", -1, myComp.LastIndexOf( myStr, "AE", iS ) );
      PrintMarker( "           ae : ", -1, myComp.LastIndexOf( myStr, "ae", iS ) );
      PrintMarker( "            Æ : ", -1, myComp.LastIndexOf( myStr, 'Æ', iS ) );
      PrintMarker( "            æ : ", -1, myComp.LastIndexOf( myStr, 'æ', iS ) );
      Console.WriteLine( "Ordinal       : {0}{1}", myStr.Substring( 0, iS + 1 ), myT1 );
      PrintMarker( "           AE : ", -1, myComp.LastIndexOf( myStr, "AE", iS, CompareOptions.Ordinal ) );
      PrintMarker( "           ae : ", -1, myComp.LastIndexOf( myStr, "ae", iS, CompareOptions.Ordinal ) );
      PrintMarker( "            Æ : ", -1, myComp.LastIndexOf( myStr, 'Æ', iS, CompareOptions.Ordinal ) );
      PrintMarker( "            æ : ", -1, myComp.LastIndexOf( myStr, 'æ', iS, CompareOptions.Ordinal ) );
      Console.WriteLine( "IgnoreCase    : {0}{1}", myStr.Substring( 0, iS + 1 ), myT1 );
      PrintMarker( "           AE : ", -1, myComp.LastIndexOf( myStr, "AE", iS, CompareOptions.IgnoreCase ) );
      PrintMarker( "           ae : ", -1, myComp.LastIndexOf( myStr, "ae", iS, CompareOptions.IgnoreCase ) );
      PrintMarker( "            Æ : ", -1, myComp.LastIndexOf( myStr, 'Æ', iS, CompareOptions.IgnoreCase ) );
      PrintMarker( "            æ : ", -1, myComp.LastIndexOf( myStr, 'æ', iS, CompareOptions.IgnoreCase ) );

      // Searches for the combining character sequence Latin capital letter U with diaeresis or Latin small letter u with diaeresis.
      myStr = "Is \u0055\u0308 or \u0075\u0308 the same as \u00DC or \u00FC?";
      Console.WriteLine();

      myT1 = new String( '-', iS );
      Console.WriteLine( "IndexOf( String, *, {0}, * )", iS );
      Console.WriteLine( "Original      : {0}", myStr );
      Console.WriteLine( "No options    : {0}{1}", myT1, myStr.Substring( iS ) );
      PrintMarker( "           U\u0308 : ", myComp.IndexOf( myStr, "U\u0308", iS ), -1 );
      PrintMarker( "           u\u0308 : ", myComp.IndexOf( myStr, "u\u0308", iS ), -1 );
      PrintMarker( "            Ü : ", myComp.IndexOf( myStr, 'Ü', iS ), -1 );
      PrintMarker( "            ü : ", myComp.IndexOf( myStr, 'ü', iS ), -1 );
      Console.WriteLine( "Ordinal       : {0}{1}", myT1, myStr.Substring( iS ) );
      PrintMarker( "           U\u0308 : ", myComp.IndexOf( myStr, "U\u0308", iS, CompareOptions.Ordinal ), -1 );
      PrintMarker( "           u\u0308 : ", myComp.IndexOf( myStr, "u\u0308", iS, CompareOptions.Ordinal ), -1 );
      PrintMarker( "            Ü : ", myComp.IndexOf( myStr, 'Ü', iS, CompareOptions.Ordinal ), -1 );
      PrintMarker( "            ü : ", myComp.IndexOf( myStr, 'ü', iS, CompareOptions.Ordinal ), -1 );
      Console.WriteLine( "IgnoreCase    : {0}{1}", myT1, myStr.Substring( iS ) );
      PrintMarker( "           U\u0308 : ", myComp.IndexOf( myStr, "U\u0308", iS, CompareOptions.IgnoreCase ), -1 );
      PrintMarker( "           u\u0308 : ", myComp.IndexOf( myStr, "u\u0308", iS, CompareOptions.IgnoreCase ), -1 );
      PrintMarker( "            Ü : ", myComp.IndexOf( myStr, 'Ü', iS, CompareOptions.IgnoreCase ), -1 );
      PrintMarker( "            ü : ", myComp.IndexOf( myStr, 'ü', iS, CompareOptions.IgnoreCase ), -1 );

      myT1 = new String( '-', myStr.Length - iS - 1 );
      Console.WriteLine( "LastIndexOf( String, *, {0}, * )", iS );
      Console.WriteLine( "Original      : {0}", myStr );
      Console.WriteLine( "No options    : {0}{1}", myStr.Substring( 0, iS + 1 ), myT1 );
      PrintMarker( "           U\u0308 : ", -1, myComp.LastIndexOf( myStr, "U\u0308", iS ) );
      PrintMarker( "           u\u0308 : ", -1, myComp.LastIndexOf( myStr, "u\u0308", iS ) );
      PrintMarker( "            Ü : ", -1, myComp.LastIndexOf( myStr, 'Ü', iS ) );
      PrintMarker( "            ü : ", -1, myComp.LastIndexOf( myStr, 'ü', iS ) );
      Console.WriteLine( "Ordinal       : {0}{1}", myStr.Substring( 0, iS + 1 ), myT1 );
      PrintMarker( "           U\u0308 : ", -1, myComp.LastIndexOf( myStr, "U\u0308", iS, CompareOptions.Ordinal ) );
      PrintMarker( "           u\u0308 : ", -1, myComp.LastIndexOf( myStr, "u\u0308", iS, CompareOptions.Ordinal ) );
      PrintMarker( "            Ü : ", -1, myComp.LastIndexOf( myStr, 'Ü', iS, CompareOptions.Ordinal ) );
      PrintMarker( "            ü : ", -1, myComp.LastIndexOf( myStr, 'ü', iS, CompareOptions.Ordinal ) );
      Console.WriteLine( "IgnoreCase    : {0}{1}", myStr.Substring( 0, iS + 1 ), myT1 );
      PrintMarker( "           U\u0308 : ", -1, myComp.LastIndexOf( myStr, "U\u0308", iS, CompareOptions.IgnoreCase ) );
      PrintMarker( "           u\u0308 : ", -1, myComp.LastIndexOf( myStr, "u\u0308", iS, CompareOptions.IgnoreCase ) );
      PrintMarker( "            Ü : ", -1, myComp.LastIndexOf( myStr, 'Ü', iS, CompareOptions.IgnoreCase ) );
      PrintMarker( "            ü : ", -1, myComp.LastIndexOf( myStr, 'ü', iS, CompareOptions.IgnoreCase ) );

   }

   public static void PrintMarker( String Prefix, int First, int Last )  {

      // Determines the size of the array to create.
      int mySize;
      if ( Last > First )
         mySize = Last;
      else
         mySize = First;

      if ( mySize > -1 )  {

         // Creates an array of Char to hold the markers.
         Char[] myCharArr = new Char[mySize+1];

         // Inserts the appropriate markers.
         if ( First > -1 )
         myCharArr[First] = 'f';
         if ( Last > -1 )
            myCharArr[Last] = 'l';
         if ( First == Last )
         myCharArr[First] = 'b';

         // Displays the array of Char as a String.
         Console.WriteLine( "{0}{1}", Prefix, new String( myCharArr ) );

      }
      else
         Console.WriteLine( Prefix );

   }

}


/*
This code produces the following output.

IndexOf( String, *, 20, * )
Original      : Is AE or ae the same as Æ or æ?
No options    : -------------------- as Æ or æ?
           AE :                         f
           ae :                              f
            Æ :                         f
            æ :                              f
Ordinal       : -------------------- as Æ or æ?
           AE :
           ae :
            Æ :                         f
            æ :                              f
IgnoreCase    : -------------------- as Æ or æ?
           AE :                         f
           ae :                         f
            Æ :                         f
            æ :                         f
LastIndexOf( String, *, 20, * )
Original      : Is AE or ae the same as Æ or æ?
No options    : Is AE or ae the same ----------
           AE :    l
           ae :          l
            Æ :    l
            æ :          l
Ordinal       : Is AE or ae the same ----------
           AE :    l
           ae :          l
            Æ :
            æ :
IgnoreCase    : Is AE or ae the same ----------
           AE :          l
           ae :          l
            Æ :          l
            æ :          l

IndexOf( String, *, 20, * )
Original      : Is U" or u" the same as Ü or ü?
No options    : -------------------- as Ü or ü?
           U" :                         f
           u" :                              f
            Ü :                         f
            ü :                              f
Ordinal       : -------------------- as Ü or ü?
           U" :
           u" :
            Ü :                         f
            ü :                              f
IgnoreCase    : -------------------- as Ü or ü?
           U" :                         f
           u" :                         f
            Ü :                         f
            ü :                         f
LastIndexOf( String, *, 20, * )
Original      : Is U" or u" the same as Ü or ü?
No options    : Is U" or u" the same ----------
           U" :    l
           u" :          l
            Ü :    l
            ü :          l
Ordinal       : Is U" or u" the same ----------
           U" :    l
           u" :          l
            Ü :
            ü :
IgnoreCase    : Is U" or u" the same ----------
           U" :          l
           u" :          l
            Ü :          l
            ü :          l

*/

import System.* ;
import System.Globalization.* ;

public class SamplesCompareInfo
{
	public static void main(String[] args)
	{
		// Creates CompareInfo for the InvariantCulture.
		CompareInfo myComp = 
			CultureInfo.get_InvariantCulture().get_CompareInfo();

		// iS is the starting index of the substring.
		int iS = 20;
		// myT1 is the string used for padding.
		String myT1;

		// Searches for the ligature .
		String myStr = "Is AE or ae the same as Æ or æ ?";
		Console.WriteLine();

		myT1 = new String('-', iS);
		Console.WriteLine("IndexOf( String, *, {0}, * )", 
			System.Convert.ToString (iS));
		Console.WriteLine("Original      : {0}", myStr);
		Console.WriteLine("No options    : {0}{1}", myT1, myStr.Substring(iS));
		PrintMarker("           AE : ", myComp.IndexOf(myStr, "AE", iS),-1);
		PrintMarker("           ae : ", myComp.IndexOf(myStr, "ae", iS),-1);
		PrintMarker("            Æ : ", myComp.IndexOf(myStr, 'Æ', iS), -1);
		PrintMarker("            æ : ", myComp.IndexOf(myStr, 'æ', iS), -1);
		Console.WriteLine("Ordinal       : {0}{1}", myT1, myStr.Substring(iS));
		PrintMarker("           AE : ", myComp.IndexOf(myStr, "AE", iS, 
			CompareOptions.Ordinal),-1);
		PrintMarker("           ae : ", myComp.IndexOf(myStr, "ae", iS, 
			CompareOptions.Ordinal),-1);
		PrintMarker("            Æ : ", myComp.IndexOf(myStr,'Æ', iS, 
			CompareOptions.Ordinal),-1);
		PrintMarker("            æ : ", myComp.IndexOf(myStr, 'æ', iS, 
			CompareOptions.Ordinal), -1);
		Console.WriteLine("IgnoreCase    : {0}{1}", myT1, myStr.Substring(iS));
		PrintMarker("           AE : ", myComp.IndexOf(myStr, "AE", iS, 
			CompareOptions.IgnoreCase),-1);
		PrintMarker("           ae : ", myComp.IndexOf(myStr, "ae", iS, 
			CompareOptions.IgnoreCase),-1);
		PrintMarker("            Æ : ", myComp.IndexOf(myStr,'Æ', iS,
			CompareOptions.IgnoreCase), -1);
		PrintMarker("            æ : ", myComp.IndexOf(myStr, 'æ', iS,
			CompareOptions.IgnoreCase), -1);

		myT1 = new String('-', myStr.length() - iS - 1);
		Console.WriteLine("LastIndexOf( String, *, {0}, * )",
			System.Convert.ToString ( iS));
		Console.WriteLine("Original      : {0}", myStr);
		Console.WriteLine("No options    : {0}{1}", 
			myStr.Substring(0, iS + 1), myT1);
		PrintMarker("           AE : ",-1, 
			myComp.LastIndexOf(myStr, "AE", iS));
		PrintMarker("           ae : ",-1,
			myComp.LastIndexOf(myStr, "ae", iS));
		PrintMarker("            Æ : ", -1, 
			myComp.LastIndexOf(myStr, 'Æ', iS));
		PrintMarker("            æ : ", -1, 
			myComp.LastIndexOf(myStr, 'æ', iS));
		Console.WriteLine("Ordinal       : {0}{1}", 
			myStr.Substring(0, iS + 1), myT1);
		PrintMarker("           AE : ",-1, 
			myComp.LastIndexOf(myStr, "AE", iS, CompareOptions.Ordinal));
		PrintMarker("           ae : ",-1, 
			myComp.LastIndexOf(myStr, "ae", iS, CompareOptions.Ordinal));
		PrintMarker("            Æ : ", -1, 
			myComp.LastIndexOf(myStr, 'Æ', iS, CompareOptions.Ordinal));
		PrintMarker("            æ : ", -1,
			myComp.LastIndexOf(myStr, 'æ', iS, CompareOptions.Ordinal));
		Console.WriteLine("IgnoreCase    : {0}{1}", 
			myStr.Substring(0, iS + 1), myT1);
		PrintMarker("           AE : ",-1, 
			myComp.LastIndexOf(myStr, "AE", iS, CompareOptions.IgnoreCase));
		PrintMarker("           ae : ",-1, 
			myComp.LastIndexOf(myStr, "ae", iS, CompareOptions.IgnoreCase));
		PrintMarker("            Æ : ", -1,
			myComp.LastIndexOf(myStr, 'Æ', iS, CompareOptions.IgnoreCase));
		PrintMarker("            æ : ", -1, 
			myComp.LastIndexOf(myStr, 'æ', iS, CompareOptions.IgnoreCase));

		// Searches for the combining character sequence Latin capital letter 
		// U with diaeresis or Latin small letter u with diaeresis.
		myStr = "Is \u0055\u0308 or \u0075\u0308 the same as \u00DC or \u00FC?";
		Console.WriteLine();

		myT1 = new String('-', iS);
		Console.WriteLine("IndexOf( String, *, {0}, * )", 
			System.Convert.ToString (iS));
		Console.WriteLine("Original      : {0}", myStr);
		Console.WriteLine("No options    : {0}{1}", myT1, myStr.Substring(iS));
		PrintMarker("           U\u0308 : ", 
			myComp.IndexOf(myStr, "U\u0308", iS),-1);
		PrintMarker("           u\u0308 : ", 
			myComp.IndexOf(myStr, "u\u0308", iS),-1);
		PrintMarker("            Ü : ",
			myComp.IndexOf(myStr, 'Ü', iS), -1);
		PrintMarker("            ü : ", 
			myComp.IndexOf(myStr, 'ü', iS), -1);
		Console.WriteLine("Ordinal       : {0}{1}", myT1, myStr.Substring(iS));
		PrintMarker("           U\u0308 : ",
			myComp.IndexOf(myStr, "U\u0308", iS, CompareOptions.Ordinal),-1);
		PrintMarker("           u\u0308 : ", 
			myComp.IndexOf(myStr, "u\u0308", iS, CompareOptions.Ordinal),-1);
		PrintMarker("            Ü : ", 
			myComp.IndexOf(myStr, 'Ü', iS, CompareOptions.Ordinal), -1);
		PrintMarker("            ü : ", 
			myComp.IndexOf(myStr, 'ü', iS, CompareOptions.Ordinal), -1);
		Console.WriteLine("IgnoreCase    : {0}{1}", myT1, myStr.Substring(iS));
		PrintMarker("           U\u0308 : ", 
			myComp.IndexOf(myStr, "U\u0308", iS, CompareOptions.IgnoreCase),-1);
		PrintMarker("           u\u0308 : ", 
			myComp.IndexOf(myStr, "u\u0308", iS, CompareOptions.IgnoreCase),-1);
		PrintMarker("            Ü : ",
			myComp.IndexOf(myStr, 'Ü', iS, CompareOptions.IgnoreCase), -1);
		PrintMarker("            ü : ", 
			myComp.IndexOf(myStr, 'ü', iS, CompareOptions.IgnoreCase), -1);

		myT1 = new String('-', myStr.length() - iS - 1);
		Console.WriteLine("LastIndexOf( String, *, {0}, * )",
			System.Convert.ToString ( iS));
		Console.WriteLine("Original      : {0}", myStr);
		Console.WriteLine("No options    : {0}{1}",
			myStr.Substring(0, iS + 1), myT1);
		PrintMarker("           U\u0308 : ",-1, 
			myComp.LastIndexOf(myStr, "U\u0308", iS));
		PrintMarker("           u\u0308 : ",-1, 
			myComp.LastIndexOf(myStr, "u\u0308", iS));
		PrintMarker("            Ü : ", -1, 
			myComp.LastIndexOf(myStr, 'Ü', iS));
		PrintMarker("            ü : ", -1, 
			myComp.LastIndexOf(myStr, 'ü', iS));
		Console.WriteLine("Ordinal       : {0}{1}", 
			myStr.Substring(0, iS + 1), myT1);
		PrintMarker("           U\u0308 : ",-1, 
			myComp.LastIndexOf(myStr, "U\u0308", iS, CompareOptions.Ordinal));
		PrintMarker("           u\u0308 : ",-1, 
			myComp.LastIndexOf(myStr, "u\u0308", iS, CompareOptions.Ordinal));
		PrintMarker("            Ü : ", -1, 
			myComp.LastIndexOf(myStr, 'Ü', iS, CompareOptions.Ordinal));
		PrintMarker("            ü : ", -1, 
			myComp.LastIndexOf(myStr, 'ü', iS, CompareOptions.Ordinal));
		Console.WriteLine("IgnoreCase    : {0}{1}", 
			myStr.Substring(0, iS + 1), myT1);
		PrintMarker("           U\u0308 : ", -1, myComp.LastIndexOf(
			myStr, "U\u0308", iS, CompareOptions.IgnoreCase));
		PrintMarker("           u\u0308 : ",-1, myComp.LastIndexOf(
			myStr, "u\u0308", iS, CompareOptions.IgnoreCase));
		PrintMarker("            Ü : ", -1, myComp.LastIndexOf(
			myStr, 'Ü', iS, CompareOptions.IgnoreCase));
		PrintMarker("            ü : ", -1, myComp.LastIndexOf(
			myStr, 'ü', iS, CompareOptions.IgnoreCase));
	} //main
   
	public static void PrintMarker(String Prefix, int First, int Last)
	{
		// Determines the size of the array to create.
		int mySize;
		if (Last > First) {
			mySize = Last;
		}
		else {
			mySize = First;
		} 
		if (mySize > -1 ) {
			// Creates an array of Char to hold the markers.
			char myCharArr[] = new char[mySize + 1];
		        
			// Inserts the appropriate markers.
			if (First > -1) {
				myCharArr[First]= 'f' ;
			}
			if (Last > -1) {
				myCharArr[Last]='l';
			}
			if (First == Last) {
				myCharArr [First]='b';
			}
		        
			// Displays the array of Char as a String.
			Console.WriteLine("{0}{1}", Prefix, new String(myCharArr));
		}
		else {
			Console.WriteLine(Prefix);
		} 
	} //PrintMarker
} //SamplesCompareInfo
 
/*
This code produces the following output.

IndexOf( String, *, 20, * )
Original      : Is AE or ae the same as Æ or æ ?
No options    : -------------------- as Æ or æ ?
           AE :                         f
           ae :                              f
            Æ :                         f
            æ :                              f
Ordinal       : -------------------- as Æ or æ ?
           AE :
           ae :
            Æ :                         f
            æ :                              f
IgnoreCase    : -------------------- as Æ or æ ?
           AE :                         f
           ae :                         f
            Æ :                         f
            æ :                         f
LastIndexOf( String, *, 20, * )
Original      : Is AE or ae the same as Æ or æ ?
No options    : Is AE or ae the same -----------
           AE :    l
           ae :          l
            Æ :    l
            æ :          l
Ordinal       : Is AE or ae the same -----------
           AE :    l
           ae :          l
            Æ :
            æ :
IgnoreCase    : Is AE or ae the same -----------
           AE :          l
           ae :          l
            Æ :          l
            æ :          l

IndexOf( String, *, 20, * )
Original      : Is U" or u" the same as Ü or ü?
No options    : -------------------- as Ü or ü?
           U" :                         f
           u" :                              f
            Ü :                         f
            ü :                              f
Ordinal       : -------------------- as Ü or ü?
           U" :
           u" :
            Ü :                         f
            ü :                              f
IgnoreCase    : -------------------- as Ü or ü?
           U" :                         f
           u" :                         f
            Ü :                         f
            ü :                         f
LastIndexOf( String, *, 20, * )
Original      : Is U" or u" the same as Ü or ü?
No options    : Is U" or u" the same ----------
           U" :    l
           u" :          l
            Ü :    l
            ü :          l
Ordinal       : Is U" or u" the same ----------
           U" :    l
           u" :          l
            Ü :
            ü :
IgnoreCase    : Is U" or u" the same ----------
           U" :          l
           u" :          l
            Ü :          l
            ü :          l
*/

Windows 98, Windows Server 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0, 1.1, 1.0

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