Shared Methods Between Selenium And SpecFlow

I have a test project that holds all the Selenium scenarios that I want to test and I want to add a SpecFlow project to this solution that obviously will use some of the WebDriver methods. I don't want to duplicate my code but the SpecFlow is not working well with the Selenium (for example Selenium is using the [TestInitialize] attribute which is not allowed in SpecFlow). What is the best way to combine the two?

I want to do the same steps as in "SomeTestMethod" but with SpecFlow.

This is an example of the project:

public class SeleniumBaseTest : BaseTest
{
    [AssemblyInitialize]
    public static void Initialize(TestContext testContext)
    {
    }

    Public SomeMethod()
    {
    }
}
[TestClass]
public class SeleniumFeature : SeleniumBaseTest 
{
   [TestInitialize]
   public void SeleInitialize()
   {
   }

   [TestMethod]
   public void SomeTestMethod()
    {            
    }
}