我用谓词建设者像拉斐尔认为，这只是一个文件在您的项目包括，那么你的例子就变成：

I have used predicate builder like Raphael suggested, it's just one file to include in your project, then your example becomes:

var keywords=new List<string>(){ "Test1","Test2" };

var predicate = PredicateBuilder.False<QuestionsMetaDatas>();

foreach (var key in keywords)
{
  predicate = predicate.Or (a => a.Text.Contains (key));
}

var query = context.QuestionsMetaDatas.AsQueryable().Where(predicate);

生成或查询您所期待的。

Generating the OR query your are looking for.