为什么会产生错误"expression required"？

Question

为什么会产生错误"expression required"?

Public Class WinApp
    Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
    End Sub
    Private Sub buttonSubmit_Click(sender As Object, e As EventArgs) Handles buttonSubmit.Click
        MessageBox.Show("Hello" + ' ' + "how are you");
    End Sub
End Class

Answer 1

为了在c#中运行应用程序，打开c#应用程序。你正在打开vb.net项目并询问c#代码:)c#

中给出了连接的实际代码

 private void button1_Click(object sender, EventArgs e)
        {
            MessageBox.Show("Hello" + ' ' + "how are you");
        }

Answer 2

MessageBox.Show("Hello" + " " + "how are you")是VB.net的代码。你把它和其他代码混在一起c#或者c++代码等等