You can use the following code to check the names of the sheets in the Excel file:
DataTable schemaTable = dbConnection.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, new object[] { null });
foreach (DataRow dataRow in schemaTable.Rows)
{
string tableName = dataRow["TABLE_NAME"].ToString();
if (!tableName.EndsWith("_"))
{
}
}