How to determine whether T is a value type in a generic type or a reference class- How to determine whether T is a value type or reference class in generic?

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problem ：

I have a generic method behavior of which depends on T is reference type or value type. I have a generic method whose behavior depends on T Is it a reference type or a value type .It looks so: It looks like this ：

T SomeGenericMethod <T> (T obj){  if (T is class) //What condition I must write in the brackets?   //to do one stuff  else //if T is a value type like struct, int, enum and etc.   //to do another stuff}

I can't duplicate this method like: I can't copy this method like this ：

T SomeGenericMethod <T> (T obj) where T : class{ //Do one stuff}T SomeGenericMethod <T> (T obj) where T : struct{ //Do another stuff}

because their signatures are equal. Because their signatures are equal .Can anyone help me? Who can help me ？

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Solution ：

Reference resources ： https://stackoom.com/en/question/Vnyi