c# - The model item passed into the dictionary is of type ..., but this dictionary requires ... -

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Whole error message: 

  The model item type given in the dictionary 'Miklaus 2 [implementation 1, implementation 2] ', but this dictionary requires a model item called' Myklos '2 [Interface 1, Interface 2]'.   
 In my view, I have a model declaration:  
  @modelmiclas & lt; Interface 1, Interface 2 & gt;   
 Where my class is a class and interface 1 and the interface 2 interface  
 I'm calling on my controller action:  
 < Code> return view (ideal);   
 Where:  Model  is of type ...  
  MyClass & lt; Implementation 1, Implementation 2 & gt; Applies  Interface 1  and  Implementation 2    
 ... and  Implementation 1  < strong> Interface 2     @modelmiclus & lt; Implementation 1, Implementation 2 & gt; Is there any way to avoid this error?    
 
 
 Because  MyClass  is  unchanging  You can not do this, which means  MyClass & lt; Implementation 1, Implementation 2 & gt;  is not  MyClass & lt; Interface 1, Interface 2 & gt; , hence the error.  
 As this is not an interface or a representative, the class can not be declared as  covariant , although you can create an interface and use it Are covariant:  
  Public Interface IMyClass & lt; Out T1, outside T2 & gt; {...} Public Classroom MyLux & lt; T1, T2 & gt; : IMIClass & lt; T1, T2 & gt; {...}   
 Model announcement in view:  
  @EmyClass model

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