C# how to force generic argument to be type -

i have generic method. want generic method limit 1 type. problem derived type not allowed - not want this. example codes:

public static t generate<t>(t input)     t : operation // allows binaryoperation - not want {     //... } 

how request?

problem derived type not allowed

there no way enforce constraint, without checking @ runtime. doing violation of liskov substitution principle, states type should allow pass in derived type without restriction.

if must enforce this, work runtime check, like:

public static t generate<t>(t input)     t : operation // allows binaryoperation - not want {     // checks see if "operation" (and not derived type)     if (input.gettype() != typeof(operation))     {         // handle bad case here...     }      // alternatively, if want not allow "binaryoperation", can do:     if (input binaryoperation)     {         // handle "bad" case of binaryoperation passed in here...     } } 

note that, in case, there's no reason make generic, same code work as:

public static operation generate(operation input) { // ...