c# - Constant in EF causes exception -

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i have following code. causes exception.

                using (var context = new blogentities())                 {                     var listofcomments = context.comments                         .orderbydescending(c => c.createdate)                         .where(c => c.createdate > fromdate)                         .select(c => new newsfeeddata()                         {                             articleid = c.articleid,                             commentid = c.commentid,                             text = c.commenttext,                             author = c.author,                             createdate = c.createdate,                             type = 'c'                         }).tolist();                  }

than tried enum there problems. best way achieve want? want assign constant type

one simple approach fetch values database anonymous type, use asenumerable switch linq objects before final projection:

using (var context = new blogentities()) {     var listofcomments = context.comments         .orderbydescending(c => c.createdate)         .where(c => c.createdate > fromdate)         .select(c => new { c.articleid, c.commentid, c.commenttext,                            c.author, c.createdate })         .asenumerable() // switch linq objects         .select(c => new newsfeeddata         {             articleid = c.articleid,             commentid = c.commentid,             text = c.commenttext,             author = c.author,             createdate = c.createdate,             type = 'c'         }).tolist();  }

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