Example of creating a custom Dynamics CRM entity using the Xrm SDK.

Create Entity.cs

CreateEntityRequest createrequest = new CreateEntityRequest
{

    //Define the entity
    Entity = new EntityMetadata
    {
        SchemaName = _customEntityName,
        DisplayName = new Label("Bank Account", 1033),
        DisplayCollectionName = new Label("Bank Accounts", 1033),
        Description = new Label("An entity to store information about customer bank accounts", 1033),
        OwnershipType = OwnershipTypes.UserOwned,
        IsActivity = false,

    },

    // Define the primary attribute for the entity
    PrimaryAttribute = new StringAttributeMetadata
    {
        SchemaName = "new_accountname",
        RequiredLevel = new AttributeRequiredLevelManagedProperty(AttributeRequiredLevel.None),
        MaxLength = 100,
        Format = StringFormat.Text,
        DisplayName = new Label("Account Name", 1033),
        Description = new Label("The primary attribute for the Bank Account entity.", 1033)
    }

};
_serviceProxy.Execute(createrequest);
Console.WriteLine("The bank account entity has been created.");