/// <summary>
/// Add <c>Role</c> to <c>System User</c>.
/// <para>
/// For more information look at https://msdn.microsoft.com/en-us/library/jj602982.aspx
/// </para>
/// </summary>
/// <param name="userId"><c>System User</c> Id</param>
/// <param name="roleId"><c>Role</c> Id.
/// <para>
/// You should provide organization related role Id.
/// </para>
/// </param>
public void AddRole(Guid userId, Guid roleId)
{
ExceptionThrow.IfGuidEmpty(userId, "userId");
ExceptionThrow.IfGuidEmpty(roleId, "roleId");
EntityReferenceCollection entityReferenceCollection = new EntityReferenceCollection();
entityReferenceCollection.Add(new EntityReference("role", roleId));
CommonHelper commonHelper = new CommonHelper(this.OrganizationService);
commonHelper.Associate(userId, this.EntityName, entityReferenceCollection, "systemuserroles_association");
}
