c# - How to incorporate delta time into movement?

I want to use delta time in my movement code for my player, and I'm not sure how to do it. At the moment, I have this:

else if (keyboardState.IsKeyDown(Keys.D))
        {
            double moveSpeed = 0.3 * delta;

            if (velocity < 0)
            {
                double turnSpeed = 0.5 * delta;
                velocity += turnSpeed;
            }

            else
            {
                if (velocity + moveSpeed > .1)
                {
                    velocity = .1;
                }
                else
                {
                    velocity += moveSpeed;
                }

            }
        }

        position.X += (float)velocity;

Is this correct? I'm trying to make my player's movement gradually speed up until it hits the maximum velocity.

position.X is the Vector2 X of the player. delta is set to gameTime.ElapsedGameTime.TotalSeconds.