public string Print(string username)
{
if (!usersString.Contains(username))
{
return("");
}
return(string.Join("", usersString.GetValue(username)));
}
public void Substring(string username, int startIndex, int length)
{
if (this.users.Contains(username))
{
var count = this.GetCount(username);
SaveOldValue(username);
var newString = this.users.GetValue(username).GetRange(startIndex, length);
this.users.GetValue(username).RemoveRange(0, count);
users.GetValue(username).InsertRange(0, newString);
}
}
