If the current System.Reflection.MethodInfo represents a generic method definition, then:

• MethodInfo.IsGenericMethodDefinition returns true.

• For each Type object in the array returned by the MethodInfo.GetGenericArguments method:

Use the MethodInfo.IsGenericMethodDefinition property to determine whether type arguments have been assigned to the type parameters of a generic method. If type arguments have been assigned, the MethodInfo.IsGenericMethodDefinition property returns false even if some of the type arguments are Type objects that represent type parameters of enclosing types. For example, consider the following C#, Visual Basic, and C++ code:

class C
{
    T N<T,U>(T t, U u) {...}
    public V M<V>(V v)
    {
        return N<V,int>(v, 42);
    }
}

Class C
    Public Function N(Of T,U)(ByVal ta As T, ByVal ua As U) As T
        ...
    End Function
    Public Function M(Of V)(ByVal va As V ) As V
        Return N(Of V, Integer)(va, 42)
    End Function
End Class

ref class C
{
private:
    generic <typename T, typename U> T N(T t, U u) {...}
public:
    generic <typename V> V M(V v)
    {
        return N<V, int>(v, 42);
    }
};

The method body of M contains a call to method N, specifying the type parameter of M and the type int. The MethodInfo.IsGenericMethodDefinition property returns false for method N<V,int>.

If a generic method definition includes generic parameters of the declaring type, there will be a generic method definition specific to each constructed type. For example, consider the following C# and Visual Basic code:

class B<U,V> {}
class C<T> { public B<T,S> M<S>() {...}}

Class B(Of U, V)
End Class
Class C(Of T)
    Public Function M(Of S)() As B(Of T, S)
        ...
    End Function
End Class 

generic <typename U, typename V> ref class B {};
generic <typename T> ref class C
{
public:
    generic <typename S> B<T,S>^ M() {...};
};

In the constructed type C<int> (C(Of Integer) in Visual Basic), the generic method M returns B<int, S>. In the open type C<T>, M returns B<T, S>. In both cases, the MethodInfo.IsGenericMethodDefinition property returns true for the System.Reflection.MethodInfo that represents M.

For a list of the invariant conditions for terms specific to generic methods, see the MethodInfo.IsGenericMethod property. For a list of the invariant conditions for other terms used in generic reflection, see the Type.IsGenericType property.