What's wrong with my C#.net code ,im trying to join a bunch of string and integers together.?

udate.Text = "Hello, " + DateTime.Now.DayOfWeek.ToString().Substr... 3) %26amp; " " %26amp; DateTime.Now.Day %26amp; ", " %26amp; definemonth() %26amp; " : You are not logged in.";


The error is at "Hello, " part it said ''Operator '%26amp;' cannot be applied to operands of type 'string' and 'string"

What's wrong with my C#.net code ,im trying to join a bunch of string and integers together.?
Concatenation in C# is done with + not %26amp;