Difference between String.Empty and ""

 Posted by Ddd on 2/12/2011 | Category: .NET Framework Interview questions | Views: 5472 | Points: 40

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:


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

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

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