React-native-windows: error CS0433: The type 'ReactNativeHost' exists in both 'ReactNative.Net46, Version=1.0.0 .0, Culture=neutral, PublicKeyToken=null' and 'ReactNative, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null' [D:\ React\ReactClicProject\windows\ReactClicProject\ReactClicProject.csproj]

[tamajitchakraborty]

Environment

1. react-native -v:
   react-native-cli: 2.0.1
   react-native: 0.55.4
2. npm ls rnpm-plugin-windows:
   -- [email protected]
3. npm ls react-native-windows:
   -- [email protected]
4. node -v: v10.4.0
5. npm -v: 6.1.0
6. yarn --version:
   react-native run-windows

React log
Scanning folders for symlinks in D:\React\ReactClicProject\node_modules (90ms) Restoring NuGet packages Building D:/React/ReactClicProject/windows/ReactClicProject.sln Found MSBuild v15.0 at C:\Program Files (x86)\Microsoft Visual Studio\2017\Professional\MSBuild\15.0\Bin Building Solution: D:/React/ReactClicProject/windows/ReactClicProject.sln Build configuration: Debug Build platform: x86 Building the projects in this solution one at a time. To enable parallel build, please add the "/m" switch. C:\Program Files (x86)\Microsoft Visual Studio\2017\Professional\MSBuild\Microsoft\VisualStudio\v15.0\AppxPackage\Micro soft.AppXPackage.Targets(5552,5): warning APPX1901: The DefaultLanguage property is either missing from the project fil e or does not have a value. The fallback language is set to the Visual Studio language: en-US. [D:\React\ReactClicProje ct\node_modules\react-native-windows\Yoga\csharp\Yoga\Yoga.Universal.vcxproj] MainReactNativeHost.cs(9,33): error CS0433: The type 'ReactNativeHost' exists in both 'ReactNative.Net46, Version=1.0.0 .0, Culture=neutral, PublicKeyToken=null' and 'ReactNative, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null' [D:\ React\ReactClicProject\windows\ReactClicProject\ReactClicProject.csproj] App.xaml.cs(24,25): error CS0433: The type 'ReactNativeHost' exists in both 'ReactNative.Net46, Version=1.0.0.0, Cultur e=neutral, PublicKeyToken=null' and 'ReactNative, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null' [D:\React\Reac tClicProject\windows\ReactClicProject\ReactClicProject.csproj] MainReactNativeHost.cs(25,33): error CS0433: The type 'IReactPackage' exists in both 'ReactNative.Net46, Version=1.0.0. 0, Culture=neutral, PublicKeyToken=null' and 'ReactNative, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null' [D:\R eact\ReactClicProject\windows\ReactClicProject\ReactClicProject.csproj] MainReactNativeHost.cs(11,32): error CS0115: 'MainReactNativeHost.MainComponentName': no suitable method found to overr ide [D:\React\ReactClicProject\windows\ReactClicProject\ReactClicProject.csproj] MainReactNativeHost.cs(14,30): error CS0115: 'MainReactNativeHost.UseDeveloperSupport': no suitable method found to ove rride [D:\React\ReactClicProject\windows\ReactClicProject\ReactClicProject.csproj] MainReactNativeHost.cs(19,35): error CS0115: 'MainReactNativeHost.JavaScriptMainModuleName': no suitable method found t o override [D:\React\ReactClicProject\windows\ReactClicProject\ReactClicProject.csproj] MainReactNativeHost.cs(25,48): error CS0115: 'MainReactNativeHost.Packages': no suitable method found to override [D:\R eact\ReactClicProject\windows\ReactClicProject\ReactClicProject.csproj] App.xaml.cs(24,41): error CS1715: 'App.Host': type must be 'ReactNativeHost' to match overridden member 'ReactApplicati on.Host' [D:\React\ReactClicProject\windows\ReactClicProject\ReactClicProject.csproj] App.xaml.cs(8,26): error CS0534: 'App' does not implement inherited abstract member 'ReactApplication.Host.get' [D:\Rea ct\ReactClicProject\windows\ReactClicProject\ReactClicProject.csproj] App.xaml.cs(10,26): error CS0433: The type 'ReactNativeHost' exists in both 'ReactNative.Net46, Version=1.0.0.0, Cultur e=neutral, PublicKeyToken=null' and 'ReactNative, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null' [D:\React\Reac tClicProject\windows\ReactClicProject\ReactClicProject.csproj] Build failed with message Error: Command failed: "C:\Program Files (x86)\Microsoft Visual Studio\2017\Professional\MSBuild\15.0\Bin\msbuild.exe" "D:/React/ReactClicProject/windows/ReactClicProject.sln" /clp:NoSummary;NoItemAndPropertyList;Verbosity=quiet /nologo /p:Configuration=Debug /p:Platform=x86 /p:AppxBundle=Never /p:PlatformToolset=v141 /p:VisualStudioVersion=15.0. Check your build configuration.

[tamajitchakraborty]

it was a build problem.

[paulbx81]

@tamajitchakraborty please can you explain me how did you solve the problem ?