Fix build error

Author: cnblogs-dudu

tests/Sample/Sample.csproj

@@ -1,9 +1,9 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFramework>netcoreapp2.1</TargetFramework>
+    <TargetFramework>netcoreapp2.1</TargetFramework>    
   </PropertyGroup>
-  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|AnyCPU'">
+  <PropertyGroup>
     <LangVersion>latest</LangVersion>
   </PropertyGroup>
   <ItemGroup>