C# 无法将方法组分配给隐式类型的局部变量
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Cannot assign method group to an implicitly-typed local variable
提问by XXXX
I have this error
我有这个错误
"Cannot assign method group to an implicitly-typed local variable"
“无法将方法组分配给隐式类型的局部变量”
in this code
在这段代码中
private async void Button_Click_2(object sender, RoutedEventArgs e)
{
var frenchvoice = InstalledVoices.All.Where(voice => voice.Language.Equals("fr-FR") & voice.Gender == VoiceGender.Female).FirstOrDefault; // in this line
sp.SetVoice(frenchvoice);
await sp.SpeakTextAsync(mytxt);
}
回答by SLaks
You forgot to call the function (with ())
您忘记调用该函数（使用()）
回答by Steve
You must add the brackets to call the method FirstOrDefault
您必须添加括号才能调用该方法 FirstOrDefault
var frenchvoice = InstalledVoices.All
.Where(voice => voice.Language.Equals("fr-FR") &&
voice.Gender == VoiceGender.Female)
.FirstOrDefault();
And, while your code works also using the & operator, the correct one to use in a logical condition is &&
而且，虽然您的代码也使用 & 运算符工作，但在逻辑条件中使用的正确代码是 &&
By the way, FirstOrDefaultaccepts the same lambda applied for Where so you could reduce your code to a simpler and probably faster
顺便说一句，FirstOrDefault接受应用于 Where 的相同 lambda，因此您可以将代码简化为更简单且可能更快
var frenchvoice = InstalledVoices.All
.FirstOrDefault(voice => voice.Language.Equals("fr-FR") &&
voice.Gender == VoiceGender.Female);
