Commented Issue: Differ: Handle MaxLength="MAX" in SSDL [726]

3rd party providers can generate this causing the differ to barf. See http://entityframework.codeplex.com/discussions/403176 for example.

Example stack trace:
System.FormatException: Input string was not in a correct format.
at System.Number.StringToNumber(String str, NumberStyles options, NumberBuffer& number, NumberFormatInfo info, Boolean parseDecimal)
at System.Number.ParseInt32(String s, NumberStyles style, NumberFormatInfo info)
at System.Convert.ToInt32(String value)
at System.Data.Entity.Migrations.Infrastructure.EdmModelDiffer.BuildColumnModel(XElement property, String entitySetName, ModelMetadata modelMetadata)
at System.Data.Entity.Migrations.Infrastructure.EdmModelDiffer.BuildAlterColumnOperation(String table, XElement targetProperty, String targetEntitySetName, ModelMetadata targetModelMetadata, XElement sourceProperty, String sourceEntitySetName, ModelMetadata sourceModelMetadata)
at System.Data.Entity.Migrations.Infrastructure.EdmModelDiffer.<FindChangedColumns>b__ef(<>f__AnonymousType1d`2 <>h__TransparentIdentifiere5)
at System.Linq.Enumerable.WhereSelectEnumerableIterator`2.MoveNext()
at System.Collections.Generic.List`1..ctor(IEnumerable`1 collection)
at System.Linq.Enumerable.ToList[TSource](IEnumerable`1 source)
at System.Data.Entity.Migrations.Infrastructure.EdmModelDiffer.Diff(XDocument sourceModel, XDocument targetModel, String connectionString)
at System.Data.Entity.Migrations.DbMigrator.IsModelOutOfDate(XDocument model, DbMigration lastMigration)
at System.Data.Entity.Migrations.DbMigrator.Upgrade(IEnumerable`1 pendingMigrations, String targetMigrationId, String lastMigrationId)
at System.Data.Entity.Migrations.Infrastructure.MigratorLoggingDecorator.Upgrade(IEnumerable`1 pendingMigrations, String targetMigrationId, String lastMigrationId)
at System.Data.Entity.Migrations.DbMigrator.Update(String targetMigration)
at System.Data.Entity.Migrations.Infrastructure.MigratorBase.Update(String targetMigration)
at System.Data.Entity.Migrations.Design.ToolingFacade.UpdateRunner.RunCore()
at System.Data.Entity.Migrations.Design.ToolingFacade.BaseRunner.Run()
Input string was not in a correct format.

Comments: Fixed in b23468571ff5 TurnItUpToEleven (Allow model differ to handle MaxLength="MAX" in SSDL) Fix for CodePlex 726: Differ: Handle MaxLength="MAX" in SSDL SSDL allows a property to be set as MaxLength="Max" which is equivalent to leaving out the MaxLength attribute. The SQL Server provider never does this (it leaves out MaxLength) but other providers can behave differently. This change fixes the parsing of MaxLength in SSDL so that it treats Max the same as not set.