How to create exception for database file not found in c#

How to create exception for database file not found in c#

I have to connect my code to the access database but mainly, have to
provide clear exception if that database file is not located in given
location (like file not found). For this code :
string connStr =( @"Provider=Microsoft.ACE.OLEDB.12.0;Data
Source=Z:\test.accdb;Persist Security Info=False");
OleDbConnection conn1 = new OleDbConnection();
conn1.ConnectionString = connStr;
OleDbCommand cmd = conn1.CreateCommand();
cmd.CommandText = "INSERT INTO customer (id, name)" + " VALUES('3', 'C');";
conn1.Open();
cmd.ExecuteNonQuery();
I want to display message if test database is not present there. What can
I do ? please suggest. thank you