C# Error CS0692 – Duplicate type parameter ‘{0}’

C# Error

CS0692 – Duplicate type parameter ‘{0}’

Reason for the Error & Solution

Duplicate type parameter ‘identifier’

The same name may not be used more than once in a type parameter list. Rename or remove the duplicate type parameter(s).

Example

The following sample generates CS0692:

// CS0692.cs  
// compile with: /target:library  
class C <T, A, T>   // CS0692  
{  
}  
  
class D <T, T>   // CS0692  
{  
}