Feature request - Early warning for size of row

[ghost]

It is well documented that the Azure Table Service & the Cosmos DB by extension place limit on entity sizes. To recap (from the doc):

• PartitionKey & RowKey must each be a max of 1 KB
• The entire row including the system columns (PK, RK & Timestamp) must be a max of 1 MB.
• There is also a limit of 255 columns (including PK, RK & Timestamp) that can be stored in a single row.

However, the SDK's Insert/Update/Delete methods allow you to send entities that violate these conditions.

There needs to be a way for the SDK to warn early (before making the REST API call) about these violations.