ExtensionMethodReferenceAsyncTExtension, TContext - делегат

public delegate ExtensionMethodAsync<TContext> ExtensionMethodReferenceAsync<in TExtension, in TContext>(
	TExtension extension
)
where TExtension : class, IExtension
where TContext : class, IExtensionContext

Public Delegate Function ExtensionMethodReferenceAsync(Of In TExtension As {Class, IExtension}, In TContext As {Class, IExtensionContext}) ( 
	extension As TExtension
) As ExtensionMethodAsync(Of TContext)

generic<typename TExtension, typename TContext>
where TExtension : ref class, IExtension
where TContext : ref class, IExtensionContext
public delegate ExtensionMethodAsync<TContext>^ ExtensionMethodReferenceAsync(
	TExtension extension
)

type ExtensionMethodReferenceAsync = 
    delegate of 
        extension : 'TExtension -> ExtensionMethodAsync<'TContext>