Pass table as parameter to SQLCLR

SqlConnection con;
// modify connection string to connect to your database
string conStr = "Server=localhost;Database=MSSQLTIPS;Trusted_Connection=True;";
con = new SqlConnection(conStr);
 con.Open();
using (con)
{                
// Configure the SqlCommand and SqlParameter.
SqlCommand sqlCmd = new SqlCommand("dbo.InsertItemsTVP", con);
sqlCmd.CommandType = CommandType.StoredProcedure;
SqlParameter tvpParam = sqlCmd.Parameters.AddWithValue("@ItemTVP", _dt); //Needed TVP
tvpParam.SqlDbType = SqlDbType.Structured; //tells ADO.NET we are passing TVP
sqlCmd.ExecuteNonQuery();
 }
con.Close();