>>>I am now trying to declare a variable with anonymous type and I can not figure out how to declare this variable correctly. The showed declaration doesn't help me
>>>
>>>

>>>var query = dtBookings.AsEnumerable().Select(c => new
>>>    {
>>>       booking_id = c.Field<Decimal>("booking_id"),
>>>       lname = c.Field<String>("lname"),
>>>       start_time = c.Field<DateTime?>("start_time"),
>>>       end_time = c.Field<DateTime?>("end_time"),
>>>       flex_tspan = c.Field<Boolean>("flex_tspan"),
>>>       layer = c.Field<Byte>("layer"),
>>>       backcolor = c.Field<Int32>("backcolor"),
>>>       forecolor = c.Field<Int32>("forecolor"),
>>>       clip_loc = c.Field<Boolean>("clip_loc"),
>>>       clip_sp = c.Field<String>("clip_sp"),
>>>       display_msg = "#Slots: " + c.Field<Int16>("num_addit").ToString() + " " + c.Field<String>("display_msg"),
>>>       isnotes = c.Field<Boolean>("isnotes"),
>>>       bookingType = "POD"
>>>    });

>>
>>and the problem is?
>
>The problem is to declare query variable separately and re-use it later.
>
>However, I decided to change that approach completely and just use stored procedure. So, for now I don't need this variable. However, I still would be interested to know as how to properly define the query variable.


I don't think you can. I rarely use anon types because of the restrictions on their usage. I generally just create a class definition like the anyonymous fields I want and then fill that class instead of an anon type. That way I can pass it around as a parameter if need be.

Did a quick google on anonymous types in c# and found this: "The type name cannot be specified in the variable declaration because only the compiler has access to the underlying name of the anonymous type.".