Char.IsLower Method (String, Int32)

Indicates whether the character at the specified position in a specified string is categorized as a lowercase letter.

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

public static bool IsLower(
	string s,
	int index
)

Parameters

s
Type: System.String
A string.
index
Type: System.Int32
The character position in s.

Return Value

Type: System.Boolean
true if the character at position index in s is a lowercase letter; otherwise, false.

ExceptionCondition
ArgumentNullException

s is null.

ArgumentOutOfRangeException

index is less than zero or greater than the last position in s.

Character positions in a string are indexed starting from zero.

Valid lowercase letters are members of the following category in UnicodeCategory: LowercaseLetter.

The following example demonstrates IsLower.


using System;

public class Example
{
   public static void Demo(System.Windows.Controls.TextBlock outputBlock)
   {
      char ch = 'a';

      outputBlock.Text += Char.IsLower(ch).ToString() + "\n";				
      outputBlock.Text += Char.IsLower("upperCase", 5).ToString() + "\n";	
   }
}
// The example produces the following output:
//    True
//    False


Silverlight

Supported in: 5, 4, 3

Silverlight for Windows Phone

Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0

XNA Framework

Supported in: Xbox 360, Windows Phone OS 7.0

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.

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