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Match.Result Method

Returns the expansion of the specified replacement pattern.

Namespace:  System.Text.RegularExpressions
Assembly:  System (in System.dll)

public virtual string Result(
	string replacement
)

Parameters

replacement
Type: System.String

The replacement pattern to use.

Return Value

Type: System.String
The expanded version of the replacement parameter.

ExceptionCondition
ArgumentNullException

replacement is null.

NotSupportedException

Expansion is not allowed for this pattern.

Whereas the Regex.Replace method replaces all matches in an input string with a specified replacement pattern, the Result method replaces a single match with a specified replacement pattern. Because it operates on an individual match, it is also possible to perform processing on the matched string before you call the Result method.

The replacement parameter is a standard regular expression replacement pattern. It can consist of literal characters and regular expression substitutions. For more information, see Substitutions in Regular Expressions.

The following example replaces the hyphens that begin and end a parenthetical expression with parentheses.

using System;
using System.Text.RegularExpressions;

public class Example
{
   public static void Main()
   {
      string pattern = "--(.+?)--";
      string replacement = "($1)";
      string input = "He said--decisively--that the time--whatever time it was--had come.";
      foreach (Match match in Regex.Matches(input, pattern))
      {
         string result = match.Result(replacement);
         Console.WriteLine(result);
      }
   }
}
// The example displays the following output: 
//       (decisively) 
//       (whatever time it was)

The regular expression pattern --(.+?)-- is interpreted as shown in the following table.

Pattern

Description

--

Match two hyphens.

(.+?)

Match any character one or more times, but as few times as possible. This is the first capturing group.

--

Match two hyphens.

Note that the regular expression pattern --(.+?)-- uses the lazy quantifier +?. If the greedy quantifier + were used instead, the regular expression engine would find only a single match in the input string.

The replacement string ($1) replaces the match with the first captured group, which is enclosed in parentheses.

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0, 1.1

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

XNA Framework

Supported in: 3.0, 2.0, 1.0

Portable Class Library

Supported in: Portable Class Library

Supported in: Windows Phone 8.1

Supported in: Windows Phone Silverlight 8.1

Supported in: Windows Phone Silverlight 8
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