Binder fix

[MarkPflug]

No description provided.

[ChairmanMawh]

This would be my preference for lines ~456+ of CompiledDataBinder.cs:

		string[]? unboundProperties = null;
		string[]? unboundColumns = null;

		string? errorMessage = null;

		if (boundPropertyCount == 0)
		{
			errorMessage = $"None of the properties on the target type ({recordType.Name}) have been successfully bound to a column on the data source. Check the schema/code definition and refer to the " +
				".UnboundProperties / .UnboundColumns properties of this exception for details of what can be bound";

		}
		else if (opts.BindingMode.HasFlag(DataBindingMode.AllProperties) && properties.Any())
		{
			unboundProperties = properties.Select(p => p.Value.Name).ToArray();
			errorMessage = $"The DataBindingMode '{opts.BindingMode}' requires that all properties of the target type ({recordType.Name}) are bound to a column, but currently {unboundProperties.Length} " +
				$"properties are not successfully bound. Check the .UnboundProperties of this exception and adjust the code/schema, or adjust the binding mode by passing a " +
				$"DataBinderOptions object when calling GetRecords()";

		}else if (opts.BindingMode.HasFlag(DataBindingMode.AllColumns) && physicalColumns.Any())
		{
			unboundColumns = physicalColumns.Select(p => p.ColumnName).ToArray();
			errorMessage = $"The DataBindingMode '{opts.BindingMode}' requires that all columns of the data source are bound to a property on the target type ({recordType.Name}), but currently " +
				$"{unboundColumns.Length} columns are not successfully bound. Check the .UnboundColumns of this exception and adjust the code/schema, or adjust the binding mode " +
				$"by passing a DataBinderOptions instance when calling GetRecords()";

		}		
		else if (requiredProperties.Any())
		{
			unboundProperties = requiredProperties.ToArray();
			unboundColumns = physicalColumns.Select(p => p.ColumnName).ToArray();
			errorMessage = $"{unboundProperties.Length} properties on the target type ({recordType.Name}) are marked as required, but they are not bound to a column on the data source. " +
				$"Check the .UnboundProperties of this exception and adjust the code/schema so that they bind successfully, or remove their [DataMember(IsRequired=true)] requirement";

		}

		if (errorMessage != null)
		{
			throw new UnboundMemberException(errorMessage, unboundProperties ?? Array.Empty<string>(), unboundColumns ?? Array.Empty<string>());
		}