The type 'MySqlConnection' exists in both 'MySql.Data Issue

问题

I have Referenced MySql.Data on one project and Other project referenced nuget package which also referenced MySqlConnector inside of it. projects has dependency .

when i compile application im getting this error

This is application hierarchy

is there any way to avoid this? or did i do anything wrong when referencing packages?

Thanks

UPDATE this is the same namespaces from difference libs

UPDATE 2

This is the sample repo which reproduced same issue

回答1:

In NET.Framework projects you can go to the reference properties and set an alias for assembly. Net core projects doesn't fully support yet aliases for assemblies. But there is a workaround to use aliases in .net core. Edit your csproj file like this:

<Project Sdk="Microsoft.NET.Sdk.Web">
...

  <Target Name="ChangeAliasesOfStrongNameAssemblies" BeforeTargets="FindReferenceAssembliesForReferences;ResolveReferences">
    <ItemGroup>
      <ReferencePath Condition="'%(FileName)' == 'MySqlConnector'">
        <Aliases>MySqlConnectorAlias</Aliases>
      </ReferencePath>
    </ItemGroup>
  </Target>
...
</Project>

then in your cs file before all usings:

extern alias MySqlConnectorAlias;

then you can reference to you type from MySqlConnector like this:

MySqlConnectorAlias::MySql.Data.MySqlClient.MySqlConnection

回答2:

It will work If you remove mysql.data reference from Your project/references.

Hope it will work for you. for me it was worked. My project is ASP.NET Core Framework. Created project in VS2017 and opening in VS2019 at that time it introduced.

来源：https://stackoverflow.com/questions/48683241/the-type-mysqlconnection-exists-in-both-mysql-data-issue

标签

asp.net-core

dependencies

nuget