C#6.0-意外字符"$" [英] C# 6.0 - Unexpected character '$'

问题描述

我是编程的新手，我刚刚安装了Visual Studio2017.我创建了此代码(从我正在学习的书中)，但是无法编译.字符串插值有问题，但出现错误:

意外字符'$'，

但是我正在使用C#6.0，所以这应该不是问题吗?

 静态void Main(string [] args){字符串比较；WriteLine(输入数字:");double var1 = ToDouble(ReadLine());WriteLine(输入另一个数字:");double var2 = ToDouble(ReadLine());如果(var1< var2)比较=小于"；别的{如果(var1 == var2)比较=等于";别的比较=大于"；}WriteLine($第一个数字是{comparison}第二个数字");ReadKey();} 

解决方案

这是一个非常小的问题:)删除 $ 之后的空间:

  WriteLine($第一个数字是{比较}第二个数字")； 

请参见

I'm new to programming and I have just installed Visual Studio 2017. I created this code (from the book I'm learning), but this does not compile. I have problem with string interpolation and I get error:

Unexpected character '$',

but I'm using C# 6.0 so this should not be a problem ?

static void Main(string[] args)   
{   
     string comparison;   
     WriteLine("Enter the number:");   
     double var1 = ToDouble(ReadLine());   
     WriteLine("Enter another number :");   
     double var2 = ToDouble(ReadLine());   
     if (var1 < var2)   
         comparison = "less than";   
     else   
     {   
         if (var1 == var2)   
             comparison = "equal to";   
         else   
             comparison = "greater than";    
      }   

     WriteLine($ "The first number is {comparison} the second number");
     ReadKey();   
}

解决方案

It is a very small problem :) Remove space after $:

WriteLine($"The first number is {comparison} the second number");

See proper structure under documentation:

$"<text> {<interpolated-expression> [,<field-width>] [:<format-string>] } <text> ..."

I've requested an edit that explains that there must be no spacing after the $ and now it states:

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