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                # Compiler Error CS1943 在具有源類型“type”的查詢表達式中后面的 from 子句中不允許使用類型為“type”的表達式。類型推理在對“method”的調用中失敗。 所有范圍變量都必須表示可查詢的類型。 ## 更正此錯誤 1. 請確保該類型是實現 **IEnumerable**、**IEnumerable&lt;T&gt;** 或派生接口的可查詢類型,或者是定義了查詢模式的任何其他類型。 2. 如果該類型是非泛型 **IEnumerable**,請在范圍變量上提供顯式類型。 下面的代碼生成 CS1943: ``` // cs1943.cs using System.Linq; class Test { class TestClass { } static void Main() { int[] nums = { 0, 1, 2, 3, 4, 5 }; TestClass tc = new TestClass(); var x = from n in nums from s in tc // CS1943 select n + s; } } ```
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