How to do a multiple case insensitive replace using a StringBuilder

CSharp · Console

/Program.cs

using System;
using System.Collections;
using System.Collections.Generic;
using System.Text.RegularExpressions;
					
public class Program
{
	public static void Main()
	{
		ReplaceMultipleWithIgnoreCaseText();
	}
	
	public static void ReplaceMultipleWithIgnoreCaseText()
	{
	    const string template = "My name is @Name@ and I like to read about @SUBJECT@ on @website@, tag @subject@";  
	    const string expected = "My name is Alex and I like to read about C# on stackoverflow.com, tag C#";
	    var replaceParameters = new List<KeyValuePair<string, string>>
	    {
	        new KeyValuePair<string, string>("@name@","Alex"),
	        new KeyValuePair<string, string>("@subject@","C#"),
	        new KeyValuePair<string, string>("@website@","stackoverflow.com"),
	    };
	    var actual = ReplaceMultiple(template, replaceParameters);
		
		Console.WriteLine(template);
		Console.WriteLine(expected);
		Console.WriteLine(actual);
	}

	public static string ReplaceMultiple(
                  string template, 
                  IEnumerable<KeyValuePair<string, string>> replaceParameters)
	{
		var result = template;
		
		foreach(var replace in replaceParameters)
		{
			var templateSplit = Regex.Split(result, 
											replace.Key, 
											RegexOptions.IgnoreCase);
			result = string.Join(replace.Value, templateSplit);
		}
		
		return result;
	}
}