StringExtensions

StringExtensions.cs

public static class StringExtensions
{
    public static string Replace(this string instance, string oldValue, string newValue, StringComparison comparisonType)
    {
        if (instance == null)
        {
            throw new ArgumentNullException("instance");
        }
        
        if (string.IsNullOrEmpty(oldValue))
        {
            return instance;
        }    
        
        int pos = -1;
        while (-1 != (pos = instance.IndexOf(oldValue, pos + 1, comparisonType)))
        {
            // TODO: compare performance with StringBuilder
            instance = instance.Remove(pos, oldValue.Length).Insert(pos, newValue);
        }

        return instance;
    }
}