Linq选择C#和VB之间不同的编译

我有以下正确编译的C#代码：

private string formatterCSharp(int number)
{
    return "n" + number;
}

private void testInCSharp()
{
    IEnumerable<int> list = new List<int>();

    IEnumerable<string> formatted = list.Select(formatterCSharp);
}

但是，我在VB中的

Select

语句中遇到两个编译错误

BC30455
    Argument not specified for parameter 'number' of 'Private Function formatterVisualBasic(number As Integer) As String'.

BC30518
    Overload resolution failed because no accessible '[Select]' can be called with these arguments:
        Extension method 'Public Function [Select](Of TResult)(selector As Func(Of Integer, TResult)) As IEnumerable(Of TResult)' defined in 'Enumerable': Type parameter 'TResult' cannot be inferred.
        Extension method 'Public Function [Select](Of TResult)(selector As Func(Of Integer, Integer, TResult)) As IEnumerable(Of TResult)' defined in 'Enumerable': Type parameter 'TResult' cannot be inferred.

试一试

在VB.net中，不能指定函数名以这样传递它

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好的，首先，选择查询在VB.NET中的格式不同，下面是它的外观：

    Dim formatted As IEnumerable(Of String) = list.Select(Function(x As String) x = formatterVisualBasic(mynumber))

其次，如果希望获得与C代码中相同的异常，则必须在函数调用formatterVisualBasic中添加括号，以便将其识别为函数

    Dim formatted As IEnumerable(Of String) = list.Select(Function(x As String) x = formatterVisualBasic())

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下面是正确的修复方法：Dim格式化为IEnumerable（Of String）=list.Select（Function（x）formatterVisualBasic（x））这不是我想要的语法。我不想做

Select（Function（x）someFunction（x）

，我只想做

Select（someFunction）

。安德烈上面的回答是正确的。

    Dim formatted As IEnumerable(Of String) = list.Select(Function(x As String) x = formatterVisualBasic(mynumber))

    Dim formatted As IEnumerable(Of String) = list.Select(Function(x As String) x = formatterVisualBasic())