Call Master page function in Page lavel

//======Master Page Function

public string LabelValue

    {

        get { return this.lblSchoolName.Text; }

        set { this.lblSchoolName.Text = value; }

    }

    public string School_Iogo

    {

        get { return this.imgSchool.ImageUrl; }

        set { this.imgSchool.ImageUrl = value; }

    }

//=========Calling From Page level

if (dt_SchoolName.Rows.Count > 0)

            {

                ((MasterHome)this.Master).LabelValue = Convert.ToString(dt_SchoolName.Rows[0]["Branch_Address1"]);

                ((MasterHome)this.Master).School_Iogo = Convert.ToString(dt_SchoolName.Rows[0]["Branch_Address1"]);

            }