请问以下语句改为C#中的写法？

Question

Dim strSQL As String = _
            "IF EXISTS (" & _
            "SELECT * " & _
            "FROM northwind.dbo.sysobjects " & _
            "WHERE NAME = 'Picture' " & _
            "AND TYPE = 'u')" & vbCrLf & _
            "BEGIN" & vbCrLf & _
            "DROP TABLE Northwind.dbo.picture" & vbCrLf & _
            "END" & vbCrLf & _
            "CREATE TABLE Picture (" & _
            "PictureID Int IDENTITY(1,1) NOT NULL," & _
            "[FileName] Varchar(255) NOT NULL," & _
            "Picture Image NOT NULL," & _
            "CONSTRAINT [PK_Picture] PRIMARY KEY CLUSTERED" & _
            "(PictureID))"先谢谢了！

Answer 1

string  strSQL="IF EXISTS (" +   "SELECT * " +..........

Answer 2

string strSQL =
    "IF EXISTS (" +
    "SELECT * " +
    "FROM northwind.dbo.sysobjects " +
    "WHERE NAME = 'Picture' " +
    "AND TYPE = 'u')\r\n" +
    "BEGIN\r\n" +
    "DROP TABLE Northwind.dbo.picture\r\n" +
    "END\r\n" +
    "CREATE TABLE Picture (" +
    "PictureID Int IDENTITY(1,1) NOT NULL," +
    "[FileName] Varchar(255) NOT NULL," +
    "Picture Image NOT NULL," +
    "CONSTRAINT [PK_Picture] PRIMARY KEY CLUSTERED" +
    "(PictureID))";

Answer 3

但这里怎么改呢 “ & vbCrLf & _”
谢谢！