what is string path

Question

/// <summary>

/// The main entry point for the application.

/// </summary>

[STAThread]

static void Main()

{

Application.EnableVisualStyles();

Application.SetCompatibleTextRenderingDefault(false);

string path = @"C:\Users\vinod\Desktop\ShriSankalp\Windows_ValChk";

string[,] passwordSt = new string[,] // 5X10

{

{"ASDF","QWER","MKOG","EDFR","CVBH","DRFW","HNKO","GHER","RERW","SWVU"},

{"ASDW","HJUM","VGTR","VFDS","PCFT","GEIK","CWTH","GETD","ETDA","EFQS"},

{"HGFD","POLK","DFRE","NBGH","JYUO","GECS","DFWU","GQAS","VRYE","CAER"},

{"GFHY", "OPHY","GHSW","JNYH","CFFR","VS5H","CD3T","C67N","F34F","F8J5"},

{"DRFW", "HNKO","GHER","RERW","SWVU","E4N7","2C8U","3F5N","3CFD","F5UT"}

};

// Validity scr = new Validity();

//bool logic = scr.Algorithm(passwordSt, path);

bool isOpen = false;

string strconnection = string.Empty;

SqlConnection con = new SqlConnection();

//if (logic == true)

 

 

 

 

I Got  Following error

{"The type initializer for 'System.Data.SqlClient.SqlConnection' threw an exception."}

 SqlConnection con = new SqlConnection();  step