Is

Determains whatever the parameter is greater than objToCompare.  The parameter must implement IComparable

Determains whatever the parameter is less than objToCompare.  The parameter must implement IComparable

Determains whatever the parameter is less than or equal to objToCompare.  The parameter must implement IComparable

Determains whatever the parameter is greater than or equal to objToCompare.  The parameter must implement IComparable

Determains whatever the parameter equal to obj.

Determains whatever the parameter does not equal to obj.

This constraint always succeeds

Determains whatever the parameter is null

Determains whatever the parameter is not null

Determains whatever the parameter if of the specified type.

Determains whatever the parameter if of the specified type.