public static string PropCase(string strText)
{
    return new CultureInfo("en").TextInfo.ToTitleCase(strText.ToLower());
}

这是另一种变化。基于这里的几个技巧，我将其简化为以下扩展方法，它非常适合我的目的:

public static string ToTitleCase(this string s) =>
    CultureInfo.InvariantCulture.TextInfo.ToTitleCase(s.ToLower());

C语言的一种方法:

char proper(char string[])
{
    int i = 0;

    for(i=0; i<=25; i++)
    {
        string[i] = tolower(string[i]);  // Converts all characters to lower case
        if(string[i-1] == ' ') // If the character before is a space
        {
            string[i] = toupper(string[i]); // Converts characters after spaces to upper case
        }
    }

    string[0] = toupper(string[0]); // Converts the first character to upper case
    return 0;
}

首先使用ToLower()，然后对结果使用CultureInfo.CurrentCulture.TextInfo.ToTitleCase以获得正确的输出。

    //---------------------------------------------------------------
    // Get title case of a string (every word with leading upper case,
    //                             the rest is lower case)
    //    i.e: ABCD EFG -> Abcd Efg,
    //         john doe -> John Doe,
    //         miXEd CaSING - > Mixed Casing
    //---------------------------------------------------------------
    public static string ToTitleCase(string str)
    {
        return CultureInfo.CurrentCulture.TextInfo.ToTitleCase(str.ToLower());
    }

下面是这个问题的解决方案……

CultureInfo cultureInfo = Thread.CurrentThread.CurrentCulture;
TextInfo textInfo = cultureInfo.TextInfo;
string txt = textInfo.ToTitleCase(txt);

MSDN: TextInfo。ToTitleCase

确保你包括:使用系统。全球化

string title = "war and peace";

TextInfo textInfo = new CultureInfo("en-US", false).TextInfo;

title = textInfo.ToTitleCase(title); 
Console.WriteLine(title) ; //War And Peace

//When text is ALL UPPERCASE...
title = "WAR AND PEACE" ;

title = textInfo.ToTitleCase(title); 
Console.WriteLine(title) ; //WAR AND PEACE

//You need to call ToLower to make it work
title = textInfo.ToTitleCase(title.ToLower()); 
Console.WriteLine(title) ; //War And Peace