W3c Validation Error In Asp.net

I am new in W3c validations, I am trying to fix this error but it's not happening. The error is following: character '&' is the first character of a delimiter but occurred as

Solution 1:

& is a special charater for concat, you need to escape it: make them all & not &.

Solution 2:

Here is the solution I came up with:

<asp:LabelID="lblDescription"runat="server"Text='<%# Server.HtmlEncode( (string) Eval("Decr")) %>'></asp:Label>