Is there a typeof inverse operation?

I get the Type but that's not the same as the Class which is what I'm looking for.

Is there an inverse operation of typeof?

EDIT

I need the class in order to use a generic repository:

GenericRepository<BaseEntity> repository = new GenericRepository<BaseEntity>(new AzureBrightData());

I started by writing BaseEntity from which all entity class descend, but the problem is that the repository needs to know which table to search for.

For example, if we have a partition key and row key combination pair of (1,1) this doesn't allow me or the repository to know from which table 开发者_如何学Goto get the registry. It's not enough and that's why I believe I need the table.

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If i undestood answers under your question than maybe you are looking for something like this (instantiate Type):

     Assembly asmApp = Assembly.LoadFile("some.dll");
     Type tApp = asmApp.GetType("Namespace.SomeClass");
     object oApp = Activator.CreateInstance(tApp, new object[0] { });

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I'll base my answer on the clarification you provided in a comment:

I misunderstood what everyone said here or at least I did not make myself clear. I want to get the class as I would use it normally. For example, I have to pass the class like this: public void methodName<T>() where T is the class.

Short answer: No, you can't, because generic types are resolved at compile time.

Long answer: Yes, you can, but you need to use reflection. Here's how you do that:

• StackOverflow: How to use reflection to call generic Method?
• StackOverflow: What's the best way to instantiate a generic from its name?

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Use the "Activator" class:

Activator.CreateInstance<T>

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I think you are looking for Activator.CreateInstance.

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Here are a few options listed in order of my preference. I am assuming that T is the type parameter in your generic class or method.

new T(); // T must be constrained to support a default constructor.

or

Activator.CreateInstance(typeof(T), new object[] { });

or

typeof(T).GetConstructor(new Type[] { }).Invoke(null);

or

AppDomain.CurrentDomain.CreateInstanceAndUnwrap(typeof(T).Assembly.FullName, typeof(T).FullName);

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Use the new() constraint.

public T Create<T>() where T : new() {
    return new T();
}

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I must be missing something. The answers provided so far don't seem to match the questions. I would love more clarity.

Nevertheless I'll try to answer the question as I see it.

You say you're trying to do this:

var repository = new GenericRepository<BaseEntity>(new AzureBrightData());

Are you trying to do something more like this?

var repository = new GenericRepository<AzureBrightData>();

If so, then your generic repository class needs to be defined as such:

public class GenericRepository<T> where T : BaseEntity, new()
{
    ...
}

Then you can define your BaseEntity class as you have been, but the instantiation of your repository will give you the actual class - and I hope then the table - that you are looking for.

I hope I have understood your question.

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I don't fully understand the OP question but I think this will certainly help some people searching for inverse of typeof which is how I got here myself.

I have a list of dynamic components in a lookup table.

class ImageComponent
{
    media: 'IMAGE';
}
  
class VideoComponent
{
    media: 'VIDEO';
}

// lookup table (runtime construct)    
const components = {

    'image': ImageComponent,
    'video': VideoComponent
}

So I want to take 'image' (the key in the table) and end up with IMAGE which is a property of ImageComponent.

Lookup the component from the table:

type imageComponent = typeof components['image'];    // typeof ImageComponent
   

If we actually had ImageComponent then we could do a type lookup on it.

ImageComponent['media']       // 'IMAGE'

But we have typeof ImageComponent instead which is useless for finding any properties on the class.

 type mediaType = imageComponent['media'];                // does not work

The actual answer...

So what we can do is get the 'prototype type' from something that is `typeof YourClassName.

  type media = imageComponent['prototype']['media'];      // 'IMAGE'  (const value)

or in other words what we're actually doing is:

  type media = (typeof ImageComponent)['prototype']['media'];

So for me this satisfied my search for 'inverse of typeof'.

Also note that 'IMAGE' and 'VIDEO' are literal types and not strings (except at runtime when they are just strings).