System.Linq.Expressions.Expression.GetUserDefinedCoercionOrThrow C# (CSharp) Method

        private static UnaryExpression GetUserDefinedCoercionOrThrow(ExpressionType coercionType, Expression expression, Type convertToType)
        {
            UnaryExpression u = GetUserDefinedCoercion(coercionType, expression, convertToType);
            if (u != null)
            {
                return u;
            }
            throw Error.CoercionOperatorNotDefined(expression.Type, convertToType);
        }