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Uri.UnescapeDataString Method

.NET Framework 4

Converts a string to its unescaped representation.

Namespace:  System
Assembly:  System (in System.dll)
C#
C++
F#
VB
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public static string UnescapeDataString(
	string stringToUnescape
)

Parameters

stringToUnescape
Type: System.String
The string to unescape.

Return Value

Type: System.String
A String that contains the unescaped representation of stringToUnescape.
Exception Condition
ArgumentNullException

stringToUnescape is null.

You should use this method with care. Unescaping a string that has been previously unescaped can lead to ambiguities and errors.

Many Web browsers escape spaces inside of URIs into plus ("+") characters; however, the UnescapeDataString method does not convert plus characters into spaces because this behavior is not standard across all URI schemes.

The following code example unescapes a URI, and then converts any plus characters ("+") into spaces.

C#
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String DataString = Uri.UnescapeDataString(".NET+Framework");
Console.WriteLine("Unescaped string: {0}", DataString);

String PlusString = DataString.Replace('+',' ');
Console.WriteLine("plus to space string: {0}", PlusString);

.NET Framework

Supported in: 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Portable Class Library

Supported in: Portable Class Library

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
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UriFormatException
UriFormatException is thrown if put some Regex string. I don't think exception should be here. Especially one not noticed.
eg. (https?://)?(([\w!~*'().&=+$%-]+: )?[\w!~*'().&=+$%-]+@)?(([0-9]{1,3}\.){3}[0-9]{1,3}|([\w!~*'()-]+\.)*([\w^-][\w-]{0,61})?[\w]\.[a-z]{2,6})(:[0-9]{1,4})?((/*)|(/+[\w!~*'().;?:@&=+$,%#-]+)+/*)
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