Linq to SQL Case何时在VB.NET中？

我如何在Linq to SQL中做一个案例(请访问vb.net).

在SQL中它将是这样的:

SELECT 
CASE
  WHEN condition THEN trueresult
  [...n]
[ELSE elseresult]
END

我如何在Linq to SQL中执行此操作？

var data = from d in db.tb select new {

CaseResult = If (d.Col1 = “Case1”, "Case 1 Rised", If (d.Col1 = “Case2”, "Case 2 Rised", "Unknown Case"))

};