public ExpressionToSql <T> Update(Expression <Func <object> > expression)
{
if (expression == null)
{
throw new ArgumentNullException("expression", "Value cannot be null");
}
this.Clear();
this._sqlBuilder.IsSingleTable = true;
this._sqlBuilder.AppendFormat("update {0} set ", this._mainTableName);
Expression2SqlProvider.Update(expression.Body, this._sqlBuilder);
return(this);
}