Adding an interface to a partial class

user_172861 0
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I have a class that is generated by a third party tool:

public partial class CloudDataContext : DbContext 
{
    // ...SNIPPED... 
    public DbSet<User> Users { get; set; } 

}

I create a partial class and then assign an interface so that I can inject this class later:

public partial class CloudDataContext : IDataContext
{

}

The IDataContext has the single property Users.

This won't compile, the compiler complains that the interface isn't implemented.

If I move the interface to the generated class, it works fine. I can't do that though as it's generated code.

How can I apply an interface to a partial class to expose the class as defined above?

interface c#
4 Answers

Here's a quick checklist. Do the classes have identical:

  • Names?
  • Namespaces?
  • Access modifiers?

Example:

  • You decide to split an existing class into two files.
  • The original file's namespace doesn't match its folder path.
  • Consequently, the new class file you create has a mismatching namespace.
  • Build fails.
user_19587260

IN my Case problem was that interface Method that was implemented in other part of the partial class was not compiling and C# was giving error of not implemented Method

user_141826870

In my case, the interface method signature didn't mention a value (uint direction) that the actual method expected. This showed up as the interface having errors in one of the partial classes. Make sure that the interface for a method is actually the same as the method signature itself. D'oh.

user_9396700
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