我没有使用过这种方法，但是Michael Kaplan在他的博客文章(有一个令人困惑的标题)中描述了一种方法，谈论剥离变音符:剥离是一项有趣的工作(又名剥离) 论无意义的意义，即一切 Mn字符是非空格的，但是 有些更非间距比 其他人)

static string RemoveDiacritics(string text) 
{
    var normalizedString = text.Normalize(NormalizationForm.FormD);
    var stringBuilder = new StringBuilder(capacity: normalizedString.Length);

    for (int i = 0; i < normalizedString.Length; i++)
    {
        char c = normalizedString[i];
        var unicodeCategory = CharUnicodeInfo.GetUnicodeCategory(c);
        if (unicodeCategory != UnicodeCategory.NonSpacingMark)
        {
            stringBuilder.Append(c);
        }
    }

    return stringBuilder
        .ToString()
        .Normalize(NormalizationForm.FormC);
}

请注意，这是他之前帖子的后续:剥离变音符....

该方法使用String。Normalize将输入字符串分割为组成符号(基本上是将“基本”字符与变音符符分开)，然后扫描结果并仅保留基本字符。这只是有点复杂，但实际上你看到的是一个复杂的问题。

当然，如果你限制自己使用法语，你可能会使用@David Dibben推荐的如何在c++ std::string中删除重音和波浪号的简单基于表的方法。

这是VB版本(工作与希腊):

导入系统。文本

导入系统。全球化

Public Function RemoveDiacritics(ByVal s As String)
    Dim normalizedString As String
    Dim stringBuilder As New StringBuilder
    normalizedString = s.Normalize(NormalizationForm.FormD)
    Dim i As Integer
    Dim c As Char
    For i = 0 To normalizedString.Length - 1
        c = normalizedString(i)
        If CharUnicodeInfo.GetUnicodeCategory(c) <> UnicodeCategory.NonSpacingMark Then
            stringBuilder.Append(c)
        End If
    Next
    Return stringBuilder.ToString()
End Function

我经常使用基于我在这里找到的另一个版本的扩展方法 (参见在c# (ascii)中替换字符) 简单解释一下:

归一化形成D，将è等字符分割为e和非空格' 由此，nospacing字符被移除 结果归一化回形式C(我不确定这是否有必要)

代码:

using System.Linq;
using System.Text;
using System.Globalization;

// namespace here
public static class Utility
{
    public static string RemoveDiacritics(this string str)
    {
        if (null == str) return null;
        var chars =
            from c in str.Normalize(NormalizationForm.FormD).ToCharArray()
            let uc = CharUnicodeInfo.GetUnicodeCategory(c)
            where uc != UnicodeCategory.NonSpacingMark
            select c;

        var cleanStr = new string(chars.ToArray()).Normalize(NormalizationForm.FormC);

        return cleanStr;
    }

    // or, alternatively
    public static string RemoveDiacritics2(this string str)
    {
        if (null == str) return null;
        var chars = str
            .Normalize(NormalizationForm.FormD)
            .ToCharArray()
            .Where(c=> CharUnicodeInfo.GetUnicodeCategory(c) != UnicodeCategory.NonSpacingMark)
            .ToArray();

        return new string(chars).Normalize(NormalizationForm.FormC);
    }
}

我需要一些东西，转换所有主要的unicode字符和投票的答案留下了一些，所以我已经创建了一个CodeIgniter的convert_accented_characters($str)的版本为c#，很容易自定义:

using System;
using System.Text;
using System.Collections.Generic;

public static class Strings
{
    static Dictionary<string, string> foreign_characters = new Dictionary<string, string>
    {
        { "äæǽ", "ae" },
        { "öœ", "oe" },
        { "ü", "ue" },
        { "Ä", "Ae" },
        { "Ü", "Ue" },
        { "Ö", "Oe" },
        { "ÀÁÂÃÄÅǺĀĂĄǍΑΆẢẠẦẪẨẬẰẮẴẲẶА", "A" },
        { "àáâãåǻāăąǎªαάảạầấẫẩậằắẵẳặа", "a" },
        { "Б", "B" },
        { "б", "b" },
        { "ÇĆĈĊČ", "C" },
        { "çćĉċč", "c" },
        { "Д", "D" },
        { "д", "d" },
        { "ÐĎĐΔ", "Dj" },
        { "ðďđδ", "dj" },
        { "ÈÉÊËĒĔĖĘĚΕΈẼẺẸỀẾỄỂỆЕЭ", "E" },
        { "èéêëēĕėęěέεẽẻẹềếễểệеэ", "e" },
        { "Ф", "F" },
        { "ф", "f" },
        { "ĜĞĠĢΓГҐ", "G" },
        { "ĝğġģγгґ", "g" },
        { "ĤĦ", "H" },
        { "ĥħ", "h" },
        { "ÌÍÎÏĨĪĬǏĮİΗΉΊΙΪỈỊИЫ", "I" },
        { "ìíîïĩīĭǐįıηήίιϊỉịиыї", "i" },
        { "Ĵ", "J" },
        { "ĵ", "j" },
        { "ĶΚК", "K" },
        { "ķκк", "k" },
        { "ĹĻĽĿŁΛЛ", "L" },
        { "ĺļľŀłλл", "l" },
        { "М", "M" },
        { "м", "m" },
        { "ÑŃŅŇΝН", "N" },
        { "ñńņňʼnνн", "n" },
        { "ÒÓÔÕŌŎǑŐƠØǾΟΌΩΏỎỌỒỐỖỔỘỜỚỠỞỢО", "O" },
        { "òóôõōŏǒőơøǿºοόωώỏọồốỗổộờớỡởợо", "o" },
        { "П", "P" },
        { "п", "p" },
        { "ŔŖŘΡР", "R" },
        { "ŕŗřρр", "r" },
        { "ŚŜŞȘŠΣС", "S" },
        { "śŝşșšſσςс", "s" },
        { "ȚŢŤŦτТ", "T" },
        { "țţťŧт", "t" },
        { "ÙÚÛŨŪŬŮŰŲƯǓǕǗǙǛŨỦỤỪỨỮỬỰУ", "U" },
        { "ùúûũūŭůűųưǔǖǘǚǜυύϋủụừứữửựу", "u" },
        { "ÝŸŶΥΎΫỲỸỶỴЙ", "Y" },
        { "ýÿŷỳỹỷỵй", "y" },
        { "В", "V" },
        { "в", "v" },
        { "Ŵ", "W" },
        { "ŵ", "w" },
        { "ŹŻŽΖЗ", "Z" },
        { "źżžζз", "z" },
        { "ÆǼ", "AE" },
        { "ß", "ss" },
        { "IJ", "IJ" },
        { "ij", "ij" },
        { "Œ", "OE" },
        { "ƒ", "f" },
        { "ξ", "ks" },
        { "π", "p" },
        { "β", "v" },
        { "μ", "m" },
        { "ψ", "ps" },
        { "Ё", "Yo" },
        { "ё", "yo" },
        { "Є", "Ye" },
        { "є", "ye" },
        { "Ї", "Yi" },
        { "Ж", "Zh" },
        { "ж", "zh" },
        { "Х", "Kh" },
        { "х", "kh" },
        { "Ц", "Ts" },
        { "ц", "ts" },
        { "Ч", "Ch" },
        { "ч", "ch" },
        { "Ш", "Sh" },
        { "ш", "sh" },
        { "Щ", "Shch" },
        { "щ", "shch" },
        { "ЪъЬь", "" },
        { "Ю", "Yu" },
        { "ю", "yu" },
        { "Я", "Ya" },
        { "я", "ya" },
    };

    public static char RemoveDiacritics(this char c){
        foreach(KeyValuePair<string, string> entry in foreign_characters)
        {
            if(entry.Key.IndexOf (c) != -1)
            {
                return entry.Value[0];
            }
        }
        return c;
    }

    public static string RemoveDiacritics(this string s) 
    {
        //StringBuilder sb = new StringBuilder ();
        string text = "";


        foreach (char c in s)
        {
            int len = text.Length;

            foreach(KeyValuePair<string, string> entry in foreign_characters)
            {
                if(entry.Key.IndexOf (c) != -1)
                {
                    text += entry.Value;
                    break;
                }
            }

            if (len == text.Length) {
                text += c;  
            }
        }
        return text;
    }
}

使用

// for strings
"crème brûlée".RemoveDiacritics (); // creme brulee

// for chars
"Ã"[0].RemoveDiacritics (); // A

这个人说:

Encoding.ASCII.GetString（Encoding.GetEncoding（1251）.获取字节（文本））;

它实际上把å这样的一个字符(它是字符代码00E5，而不是0061加上修饰符030A，看起来是一样的)分割成一个加上某种修饰符，然后ASCII转换删除修饰符，只留下a。

为了像最初的问题一样简单地删除法语加拿大重音标记，这里有一个使用正则表达式而不是硬编码转换和For/Next循环的替代方法。根据您的需要，它可以被压缩成一行代码;但是，我将它添加到一个扩展类中，以便于重用。

Visual Basic

Imports System.Text
Imports System.Text.RegularExpressions

Public MustInherit Class StringExtension
    Public Shared Function RemoveDiacritics(Text As String) As String
        Return New Regex("\p{Mn}", RegexOptions.Compiled).Replace(Text.Normalize(NormalizationForm.FormD), String.Empty)
    End Function
End Class

实现

    Private Shared Sub DoStuff()
        MsgBox(StringExtension.RemoveDiacritics(inputString))
    End Sub

c#

using System.Text;
using System.Text.RegularExpressions;

namespace YourApplication
{
    public abstract class StringExtension
    {
        public static string RemoveDiacritics(string Text)
        {
            return new Regex(@"\p{Mn}", RegexOptions.Compiled).Replace(Text.Normalize(NormalizationForm.FormD), string.Empty);
        }
    }
}

实现

        private static void DoStuff()
        {
            MessageBox.Show(StringExtension.RemoveDiacritics(inputString));
        }

Input： äáčďěéíľľňôóřŕšťúůýž ÄÁČĎĚÉÍĽĽŇÔŘŔŠŤÚŮÝŽ ÖÜË łŁđĐ țŢşŞçÇ øı

Output： aacdeeillnoorrstuuyz AACDEEILLNOORRSTUUYZ OUE łŁđĐ tTsScC øı

我加入了无法转换的字符，以帮助可视化接收到意外输入时会发生什么。

如果您还需要它来转换其他类型的字符，如波兰语的warsaw和Ł，那么根据您的需要，可以考虑合并这个答案(。NET Core友好)，它使用CodePagesEncodingProvider到您的解决方案中。