public static string ReplaceString(string whom, string what, string with)
{
int j = -1;
int i = whom.IndexOf(what);
if (i == -1)
return whom;
StringBuffer b = new StringBuffer();
b.ensureCapacity(whom.Length);
while (i > -1)
{
b.append( whom.Substring(j + what.Length, i - j - what.Length) + with );
j = i;
i = whom.IndexOf(what, i + what.Length);
}
b.append( whom.Substring(j + what.Length) );
return b.ToString();
}
