txtCompanyAddress.DataBindings.Add("Text", CompanyDetailsDataSet,
"CompanyDetails.CompanyAddress");

protected BindingManagerBase BindingManager
        {
            get
            {
                return this.BindingContext[CompanyDetailsDataSet, "CompanyDetails"];
            }
        }

txtCompanyAddress.DataBindings.Add("Text", CompanyDetailsDataSet,"CompanyDetails.CompanyAddress", true,DataSourceUpdateMode.OnPropertyChanged);

textBox1.DataBinding.Add("Text",ds.Tables[0],"ColumnName")