When trying to insert data into an Azure Table, and calling SaveChanges() you may get an exception like:

image

One reason that you can get this error is if you are trying to insert an unsupported type into a table.  Decimal types, for example, are unsupported at this time.

The list of supported types are:

ADO.NET Data Services type Common Language Runtime type Details

Edm.Binary

byte[]

An array of bytes up to 64 KB in size.

Edm.Boolean

bool

A Boolean value.

Edm.DateTime

DateTime

A 64-bit value expressed as Coordinated Universal Time (UTC). The supported DateTime range begins from 12:00 midnight, January 1, 1601 A.D. (C.E.), UTC. The range ends at December 31, 9999.

Edm.Double

double

A 64-bit floating point value.

Edm.Guid

Guid

A 128-bit globally unique identifier.

Edm.Int32

Int32 or int

A 32-bit integer.

Edm.Int64

Int64 or long

A 64-bit integer.

Edm.String

String

A UTF-16-encoded value. String values may be up to 64 KB in size.

This list is from: http://msdn.microsoft.com/en-us/library/dd179338.aspx