Difference between String.Empty and ""

Answer:

String.Empty is a readonly field, while "" is a constant
Consider this code snippet.

private void button1_Click(object sender, EventArgs e)

        {

            string s = textBox1.Text;

            switch (s)

            {

                case String.Empty:

                    MessageBox.Show("blank");

                    break;

            }





        }

//Compiler will generate an error
//A constant value is expected

//So, if we use "" in place of String.Empty, no error will be generated.