vbnet 正则表达式
VB.NET中的正则表达式可以使用System.Text.RegularExpressions命名空间中的Regex类来实现。以下是一些常用的正则表达式示例：
1. 检查字符串是否匹配特定模式：
vb
Dim input As String = "Hello World"
Dim pattern As String = "Hello"
Dim isMatch As Boolean = Regex.IsMatch(input, pattern)
2. 查匹配的字符串：
vb
Dim input As String = "Hello World"
Dim pattern As String = "\b\w+\b"
Dim matches As MatchCollection = Regex.Matches(input, pattern)
For Each match As Match In matches
    Console.WriteLine(match.Value)
Next
3. 替换匹配的字符串：
vb
Dim input As String = "Hello World"
Dim pattern As String = "World"
Dim replacement As String = "Universe"
Dim result As String = Regex.Replace(input, pattern, replacement)
正则匹配特定字符串
4. 拆分字符串：
vb
Dim input As String = "Hello,World"
Dim pattern As String = ","
Dim parts As String() = Regex.Split(input, pattern)
For Each part As String In parts
    Console.WriteLine(part)
Next
这些示例只是VB.NET中正则表达式的一小部分功能，更复杂的模式匹配和替换可以使用更多的正则表达式语法。您可以参考MSDN文档以获取更多详细信息和示例：

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