var table = m_dc.Table.Where(x => x.Fk_Own == m_own.id);

private bool _snyat_;
//....
		[Column(Name="snyat", Storage="_snyat_", DbType="Bit NOT NULL")]
		public bool snyat_
		{
			get
			{
				return this._snyat_;
			}
			set
			{
				if ((this._snyat_ != value))
				{
					this.Onsnyat_Changing(value);
					this.SendPropertyChanging();
					this._snyat_ = value;
					this.SendPropertyChanged("snyat_");
					this.Onsnyat_Changed();
				}
			}
		}

var table = m_dc.Table.Where(x => x.Fk_Own == m_own.id);
m_dc.Refresh(System.Data.Linq.RefreshMode.OverwriteCurrentValues, table );