Тип "Main" уже определяет член с именем "Main" с теми же типами параметров - C#

public partial class Main : DataContext
{
 
    public Main(string connectionString) : 
            base(connectionString)
    {
        
    }
    
    public Main(string connection, MappingSource mappingSource) : 
            base(connection, mappingSource)
    {
        
    }
    
    public Main(IDbConnection connection, MappingSource mappingSource) : 
            base(connection, mappingSource)
    {
        
    }
}

public partial class Main
{
    
    public Main(IDbConnection connection) : 
            base(connection, new DbLinq.Sqlite.SqliteVendor())
    {
        
    }
    
    public Main(IDbConnection connection, IVendor sqlDialect) : 
            base(connection, sqlDialect)
    {
        
    }
    
    public Main(IDbConnection connection, MappingSource mappingSource, IVendor sqlDialect) : 
            base(connection, mappingSource, sqlDialect)
    {
        
    }
}